diff --git a/src/index.js b/src/index.js
index 1f49d8b..9d56d42 100644
--- a/src/index.js
+++ b/src/index.js
@@ -27,16 +27,14 @@ let menu_template = [
       {
         label: "Save",
         accelerator: "Ctrl+S",
-        click: function () {
-          let window = BrowserWindow.getFocusedWindow();
+        click: function (item, window, event) {
           window.webContents.send("save", false);
         }
       },
       {
         label: "Save As",
         accelerator: "Ctrl+Shift+S",
-        click: function () {
-          let window = BrowserWindow.getFocusedWindow();
+        click: function (item, window, event) {
           window.webContents.send("save", true);
         }
       },
@@ -63,15 +61,26 @@ let menu_template = [
     label: "Edit",
     submenu: [
       {
-        label: "Copy",
-        accelerator: "Ctrl+C",
-        click: function () {
-          let window = BrowserWindow.getFocusedWindow();
-          window.webContents.send("copy-to-clipboard");
-        }
+        label: "Cut",
+        role: "cut",
       },
+      {
+        label: "Copy",
+        role: "copy",
+      },
+      {
+        label: "Paste",
+        role: "paste",
+      },
+      {
+        label: "Select All",
+        accelerator: "Ctrl+A",
+        click: function (item, window, event) {
+          window.webContents.send("select-all");
+        }
+      }
     ]
-  }
+  },
 ]
 
 // Handle creating/removing shortcuts on Windows when installing/uninstalling.
@@ -121,7 +130,7 @@ function createSplashScreen() {
 
   splash_screen.loadFile(path.join(app.getAppPath(), "src/splash.html"));
   // Open the DevTools.
-  // splash_screen.webContents.openDevTools();
+  splash_screen.webContents.openDevTools();
   // store.openInEditor();
 }
 
@@ -142,7 +151,7 @@ function createEditorWindow(json) {
       main_window.webContents.send("open", json);
     });
   // Open the DevTools.
-  // main_window.webContents.openDevTools();
+  main_window.webContents.openDevTools();
   return main_window;
 }
 
diff --git a/src/js/editor.js b/src/js/editor.js
index 39bbec2..e74be8a 100644
--- a/src/js/editor.js
+++ b/src/js/editor.js
@@ -3,7 +3,7 @@ let json_data;
 let tables_data;
 let current_table;
 let selected_cells = [];
-let selected_cell_data;
+let selection_data;
 let is_positioning = false;
 let nav = $("nav");
 let nav_scroll = nav.scrollLeft();
@@ -32,8 +32,7 @@ function clearPage() {
 	$("#tables").empty();
 	nav.empty();
 	$("#details input, #details textarea").val("");
-	selected_cells = [];
-	selected_cell_data = null;
+	selection_data = null;
 }
 
 function refreshPage() {
@@ -168,7 +167,7 @@ function generateTables() {
 
 function updateDetailsPanel() {
 	if (!is_positioning) {
-		let data = getSelectedCellData(true);
+		let data = getSelectionData(true);
 		detail_tab_name.val(data["tab_name"]);
 		detail_table_name.val(data["table_name"]);
 		detail_table_description.val(data["table_description"]);
@@ -215,17 +214,18 @@ function selectCells(cell_ids) {
 	if (!Array.isArray(cell_ids)) {
 		cell_ids = [cell_ids];
 	}
-	selected_cells = cell_ids;
 	updateDetailsPanel();
 }
 
-function getSelectedCellData(force_update=false) {
-	if (!force_update && selected_cell_data) {
-		return selected_cell_data;
+function getSelectionData(force_update=false) {
+	let selected_cells = getSelectedCells();
+	if (!force_update && selection_data && selection_data["selection_count"] === selected_cells.length) {
+		return selection_data;
 	}
 	let cell_data = {};
 	$.each(tables_data, (i, table_data) => {
 		if (table_data["id"] === current_table) {
+			cell_data["selection_count"] = selected_cells.length;
 			cell_data["table_index"] = i;
 			cell_data["table_name"] = table_data["name"];
 			cell_data["tab_name"] = table_data["tab_name"];
@@ -259,13 +259,15 @@ function getSelectedCellData(force_update=false) {
 							return false;
 						}
 					})
+				} else {
+					cell_data["row_index"] = -1;
 				}
 			}
 			return false;
 		}
 	})
-	selected_cell_data = cell_data;
-	return selected_cell_data;
+	selection_data = cell_data;
+	return selection_data;
 }
 
 function addTable() {
@@ -300,7 +302,7 @@ function addTable() {
 		]
 	}
 	tables_data.push(table_data);
-	getSelectedCellData(true);
+	getSelectionData(true);
 	generateTable(table_data);
 }
 
@@ -369,7 +371,7 @@ function insertColumn(table_id, index=-1) {
 				tr.children(`td:nth-child(${index + 1})`)
 					.insert(cell)
 			});
-			getSelectedCellData(true);
+			getSelectionData(true);
 			return false;
 		}
 	})
@@ -377,7 +379,7 @@ function insertColumn(table_id, index=-1) {
 	selectable.add(cells_to_add);
 }
 
-function insertRow(table_id, index) {
+function insertRow(table_id, index=-1) {
 	let cells_to_add = [];
 	$.each(tables_data, (i, table_data) => {
 		if (table_data["id"] === table_id) {
@@ -418,7 +420,7 @@ function insertRow(table_id, index) {
 			}
 			$(`#${table_id} > tbody > tr:nth-child(${index+1})`)
 				.insert(tr);
-			getSelectedCellData(true);
+			getSelectionData(true);
 			return false;
 		}
 	})
@@ -465,8 +467,12 @@ function deleteRow(table_id, row_index) {
 
 function cellContextMenu(event, cell_id) {
 	if (is_positioning) {return;}
-	if (!selected_cells.includes(cell_id)) {
-		selectCell(cell_id);
+	if (!getSelectedCells().includes(cell_id)) {
+		let selectable = getSelectable();
+		selectable.selectAll();
+		selectable.invert();
+		selectable.select($("#"+cell_id)[0]);
+		getSelectionData(true);
 	}
 	let menu = $("<div>")
 		.attr("id", "context-menu-"+cell_id)
@@ -477,37 +483,37 @@ function cellContextMenu(event, cell_id) {
 		.append($("<button>")
 			.addClass("list-group-item list-group-item-action")
 			.on("click", () => {
-				let data = getSelectedCellData();
+				let data = getSelectionData();
 				insertRow(current_table, data["row_index"]);
 			})
 			.text("Insert row above"))
 		.append($("<button>")
 			.addClass("list-group-item list-group-item-action")
 			.on("click", () => {
-				let data = getSelectedCellData();
+				let data = getSelectionData();
 				insertRow(current_table, data["row_index"]+1);
 			})
 			.text("Insert row below"))
 		.append($("<button>")
 			.addClass("list-group-item list-group-item-action")
 			.on("click", () => {
-				let data = getSelectedCellData();
+				let data = getSelectionData();
 				insertColumn(current_table, data["col_index"]);
 			})
 			.text("Insert column left"))
 		.append($("<button>")
 			.addClass("list-group-item list-group-item-action")
 			.on("click", () => {
-				let data = getSelectedCellData();
+				let data = getSelectionData();
 				insertColumn(current_table, data["col_index"]+1);
 			})
 			.text("Insert column right"))
-	let data = getSelectedCellData();
+	let data = getSelectionData();
 	if (data["num_cols"] > 1) {
 		menu.append($("<button>")
 			.addClass("list-group-item list-group-item-action list-group-item-danger")
 			.on("click", () => {
-				let data = getSelectedCellData();
+				let data = getSelectionData();
 				deleteColumn(current_table, data["col_index"]);
 				menu.remove();
 			})
@@ -516,8 +522,8 @@ function cellContextMenu(event, cell_id) {
 	if (data["num_rows"] > 1) {
 		menu.append($("<button>")
 			.addClass("list-group-item list-group-item-action list-group-item-danger")
-			.on("click", () => {
-				let data = getSelectedCellData();
+			.on("click", function() {
+				let data = getSelectionData();
 				deleteRow(current_table, data["row_index"]);
 				menu.remove();
 			})
@@ -536,8 +542,12 @@ function cellContextMenu(event, cell_id) {
 
 function headerContextMenu(event, header_id) {
 	if (is_positioning) {return;}
-	if (!selected_cells.includes(header_id)) {
-		selectCell(header_id);
+	if (!getSelectedCells().includes(header_id)) {
+		let selectable = getSelectable();
+		selectable.selectAll();
+		selectable.invert();
+		selectable.select($("#"+header_id)[0]);
+		getSelectionData(true);
 	}
 	let menu = $("<div>")
 		.attr("id", "context-menu-"+header_id)
@@ -548,24 +558,24 @@ function headerContextMenu(event, header_id) {
 		.append($("<button>")
 			.addClass("list-group-item list-group-item-action")
 			.on("click", () => {
-				let data = getSelectedCellData();
+				let data = getSelectionData();
 				insertColumn(current_table, data["col_index"]);
 			})
 			.text("Insert column left"))
 		.append($("<button>")
 			.addClass("list-group-item list-group-item-action")
 			.on("click", () => {
-				let data = getSelectedCellData();
+				let data = getSelectionData();
 				insertColumn(current_table, data["col_index"]+1);
 			})
 			.text("Insert column right"));
 
-	let data = getSelectedCellData();
+	let data = getSelectionData();
 	if (data["num_cols"] > 1) {
 		menu.append($("<button>")
 			.addClass("list-group-item list-group-item-action list-group-item-danger")
 			.on("click", () => {
-				let data = getSelectedCellData();
+				let data = getSelectionData();
 				deleteColumn(current_table, data["col_index"]);
 				menu.remove();
 			})
@@ -584,7 +594,7 @@ function headerContextMenu(event, header_id) {
 
 function navContextMenu(event, table_id) {
 	if (is_positioning) {return;}
-	let data = getSelectedCellData();
+	let data = getSelectionData();
 	let menu = $("<div>")
 		.attr("id", "context-menu-"+table_id)
 		.addClass("border context-menu text-nowrap list-group")
@@ -621,7 +631,7 @@ function navContextMenu(event, table_id) {
 
 function cellInlineEdit(event) {
 	if (is_positioning) {return;}
-	let data = getSelectedCellData()
+	let data = getSelectionData()
 	let target = $(event.target);
 	let text_area = $("<textarea>")
 		.on("focusout", () => {
@@ -645,12 +655,12 @@ function closeCellInlineEdit(save=false) {
 		let val = $("td.inline-edit > textarea").val()
 		$("td.inline-edit").html(val)
 			.removeClass("inline-edit");
-		let data = getSelectedCellData();
+		let data = getSelectionData();
 		tables_data[data["table_index"]]["rows"][data["row_index"]][data["row_key"]] = val;
-		selected_cell_data["cell_text"] = val;
+		selection_data["cell_text"] = val;
 		detail_cell_text.val(val);
 	} else {
-		let data = getSelectedCellData();
+		let data = getSelectionData();
 		$("td.inline-edit").removeClass("inline-edit")
 			.html(data["cell_text"]);
 	}
@@ -658,7 +668,7 @@ function closeCellInlineEdit(save=false) {
 
 function headerInlineEdit(event) {
 	if (is_positioning) {return;}
-	let data = getSelectedCellData()
+	let data = getSelectionData()
 	let target = $(event.target);
 	let text_area = $("<textarea>")
 		.on("focusout", () => {
@@ -682,12 +692,12 @@ function closeHeaderInlineEdit(save=false) {
 		let val = $("th.inline-edit > textarea").val()
 		$("th.inline-edit").html(val)
 			.removeClass("inline-edit");
-		let data = getSelectedCellData();
+		let data = getSelectionData();
 		tables_data[data["table_index"]]["columns"][data["col_index"]]["title"] = val;
-		selected_cell_data["col_name"] = val;
+		selection_data["col_name"] = val;
 		detail_column_name.val(val);
 	} else {
-		let data = getSelectedCellData();
+		let data = getSelectionData();
 		$("th.inline-edit").removeClass("inline-edit")
 			.html(data["col_name"]);
 	}
@@ -697,7 +707,7 @@ function moveTable(old_index, new_index) {
 	let table_data = tables_data[old_index];
 	tables_data.splice(old_index, 1);
 	tables_data.splice(new_index, 0, table_data);
-	getSelectedCellData(true);
+	getSelectionData(true);
 }
 
 function moveRow(table_id, old_index, new_index) {
@@ -709,7 +719,7 @@ function moveRow(table_id, old_index, new_index) {
 			table_data["rows"].splice(new_index, 0, row);
 		}
 	}
-	getSelectedCellData(true);
+	getSelectionData(true);
 }
 
 function moveCol(table_id, old_index, new_index) {
@@ -720,7 +730,7 @@ function moveCol(table_id, old_index, new_index) {
 			table_data["columns"].splice(new_index, 0, col);
 		}
 	}
-	getSelectedCellData(true)
+	getSelectionData(true)
 	refreshPage();
 }
 
@@ -804,7 +814,6 @@ function disableSelection() {
 		selectable.clear();
 		selectable.disable();
 	}
-	selected_cells = [];
 	updateDetailsPanel();
 }
 
@@ -833,13 +842,7 @@ function getSelectable() {
 				$("*").blur();
 			})
 			selectable.on("end", (event, selected, unselected) => {
-				let cells = [];
-				$.each(selected, (i, item) => {
-					cells.push($(item.node).attr("id"));
-				});
-				if (JSON.stringify(cells) !== JSON.stringify(selected_cells)) {
-					selectCells(cells);
-				}
+				updateDetailsPanel();
 			});
 			if (is_positioning) {
 				selectable.disable();
@@ -864,11 +867,38 @@ function selectFirstCell() {
 	getSelectable().select($("table:visible > tbody > tr:first > td:first")[0]);
 }
 
-function copyToClipboard() {
+function getDeselectingItems(invert) {
+	return getSelectable().getItems().filter(function(item) {
+		return invert ? !item.deselecting : item.deselecting;
+	});
+}
+
+function getDeselectingNodes() {
+	return getDeselectingItems().map(function(item) {
+		return item.node;
+	});
+}
+
+function getSelectedCells() {
+	let selectable = getSelectable();
+	let nodes = selectable.getSelectedNodes();
+	if (nodes.length === 0) {
+		nodes = getDeselectingNodes();
+	}
+	let selected = [];
+	for (let node of nodes) {
+		selected.push($(node).attr("id"));
+	}
+	return selected;
+}
+
+function copyToClipboard(cut=false) {
 	let selectable = getSelectable();
 	let items = selectable.getSelectedItems();
 	let selection = "";
 	let previous_row;
+	let previous_row_elm = $("<tr>");
+	let table = $("<table>");
 	for (let item of items) {
 		let el = $(item["node"]);
 		let row_pattern = /(row\d+)/;
@@ -880,17 +910,83 @@ function copyToClipboard() {
 			row = "header";
 		}
 		let item_text = el.text();
+		if (cut) {
+			el.text("");
+			let data = getSelectionData();
+			let table_index = data["table_index"];
+			let col_index = el.index();
+			if (el.prop("tagName") === "TH") {
+				tables_data[table_index]["columns"][col_index]["title"] = "";
+			} else {
+				let row_key = tables_data[table_index]["columns"][col_index]["field"];
+				let row_index = el.parent().index();
+				tables_data[table_index]["rows"][row_index][row_key] = "";
+			}
+		}
 		if (!previous_row) {
 			selection += item_text;
+			previous_row_elm.append("<td>"+item_text+"</td>");
 		} else if (previous_row === row) {
 			selection += "\t"+item_text;
+			previous_row_elm.append("<td>"+item_text+"</td>");
 		} else {
-			selection += "\n"+item_text;
+			selection += "\r\n"+item_text;
+			table.append(previous_row_elm);
+			previous_row_elm = $("<tr>");
+			previous_row_elm.append("<td>"+item_text+"</td>");
 		}
 		previous_row = row;
 	}
-	clipboard.writeText(selection);
-	console.log(selection);
+	table.append(previous_row_elm);
+	clipboard.clear();
+	clipboard.write({
+		"text": selection,
+		"html": table.prop("outerHTML"),
+	})
+}
+
+function pasteFromClipboard() {
+	let text = clipboard.readText();
+	let rows = text.split("\r\n");
+	for (let i=0; i < rows.length; i++) {
+		rows[i] = rows[i].split("\t");
+	}
+	let selectable = getSelectable();
+	let selected_items = selectable.getSelectedItems();
+	selected_items.splice(0, 1);
+	if(selected_items.length > 0) {
+		selectable.deselect(selected_items);
+	}
+	let data = getSelectionData();
+	let row_index = data["row_index"];
+	let col_index = data["col_index"];
+	let num_rows_needed = row_index+1+rows.length-(data["num_rows"]+1);
+	let num_cols_needed = col_index+rows[0].length-data["num_cols"];
+	for (let i=0; i < num_rows_needed; i++) {
+		insertRow(current_table);
+	}
+	for (let i=0; i < num_cols_needed; i++) {
+		insertColumn(current_table);
+	}
+	let x = 0;
+	let y = 0;
+	for (let i=row_index; i < row_index+rows.length; i++) {
+		for (let j=col_index; j < col_index+rows[0].length; j++) {
+			let cell_elm;
+			if (i === -1) {
+				cell_elm = $(`#${current_table} > thead > tr > th:nth-child(${j+1})`);
+				tables_data[data["table_index"]]["columns"][j]["title"] = rows[y][x];
+			} else {
+				cell_elm = $(`#${current_table} > tbody > tr:nth-child(${i+1}) > td:nth-child(${j+1})`);
+				let row_key = tables_data[data["table_index"]]["columns"][j]["field"];
+				tables_data[data["table_index"]]["rows"][i][row_key] = rows[y][x];
+			}
+			cell_elm.text(rows[y][x]);
+			x++;
+		}
+		y++;
+		x = 0;
+	}
 }
 
 function getColumnIDs(columns) {
@@ -917,6 +1013,10 @@ function getTableIDs() {
 	return ids;
 }
 
+function makeCopy(json) {
+	return JSON.parse(JSON.stringify(json));
+}
+
 nav.on("wheel", (event) => {
 	event.preventDefault();
 	if (event.originalEvent.deltaY > 0) {
@@ -937,68 +1037,68 @@ nav.on("wheel", (event) => {
 detail_tab_name.on("input", (event) => {
 	let input = $(event.target);
 	let new_tab_name = input.val();
-	let data = getSelectedCellData();
+	let data = getSelectionData();
 	tables_data[data["table_index"]]["tab_name"] = new_tab_name;
-	selected_cell_data["tab_name"] = new_tab_name;
+	selection_data["tab_name"] = new_tab_name;
 });
 
 detail_table_name.on("input", (event) => {
 	let input = $(event.target);
 	let new_table_name = input.val();
-	let data = getSelectedCellData();
+	let data = getSelectionData();
 	$(`#${current_table}-nav`).text(new_table_name);
 	tables_data[data["table_index"]]["name"] = new_table_name;
-	selected_cell_data["table_name"] = new_table_name;
+	selection_data["table_name"] = new_table_name;
 });
 
 detail_table_description.on("input", (event) => {
 	let input = $(event.target);
 	let new_table_description = input.val();
-	let data = getSelectedCellData();
+	let data = getSelectionData();
 	tables_data[data["table_index"]]["description"] = new_table_description;
-	selected_cell_data["table_description"] = new_table_description;
+	selection_data["table_description"] = new_table_description;
 })
 
 detail_table_hidden.on("input", (event) => {
 	let input = $(event.target);
 	let table_hidden = input.prop("checked");
-	let data = getSelectedCellData();
+	let data = getSelectionData();
 	tables_data[data["table_index"]]["hidden"] = table_hidden;
-	selected_cell_data["table_hidden"] = table_hidden;
+	selection_data["table_hidden"] = table_hidden;
 });
 
 detail_column_name.on("input", (event) => {
 	let input = $(event.target);
 	let new_col_name = input.val();
-	let data = getSelectedCellData();
+	let data = getSelectionData();
 	$(`#${data["col_id"]}`).text(new_col_name);
 	tables_data[data["table_index"]]["columns"][data["col_index"]]["title"] = new_col_name;
-	selected_cell_data["col_name"] = new_col_name;
+	selection_data["col_name"] = new_col_name;
 });
 
 detail_column_selectable.on("input", (event) => {
 	let input = $(event.target);
 	let column_selectable = input.prop("checked");
-	let data = getSelectedCellData();
+	let data = getSelectionData();
 	tables_data[data["table_index"]]["columns"][data["col_index"]]["selectable"] = column_selectable;
-	selected_cell_data["col_selectable"] = column_selectable;
+	selection_data["col_selectable"] = column_selectable;
 });
 
 detail_column_sortable.on("input", (event) => {
 	let input = $(event.target);
 	let column_sortable = input.prop("checked");
-	let data = getSelectedCellData();
+	let data = getSelectionData();
 	tables_data[data["table_index"]]["columns"][data["col_index"]]["sortable"] = column_sortable;
-	selected_cell_data["col_sortable"] = column_sortable;
+	selection_data["col_sortable"] = column_sortable;
 });
 
 detail_cell_text.on("input", (event) => {
 	let input = $(event.target);
 	let new_cell_text = input.val();
-	let data = getSelectedCellData();
+	let data = getSelectionData();
 	$(`#${data["cell_id"]}`).text(new_cell_text);
 	tables_data[data["table_index"]]["rows"][data["row_index"]][data["row_key"]] = new_cell_text;
-	selected_cell_data["cell_text"] = new_cell_text;
+	selection_data["cell_text"] = new_cell_text;
 });
 
 position_edit_btn.on("click", () => {
@@ -1008,10 +1108,39 @@ position_edit_btn.on("click", () => {
 $(document).on("copy", (event) => {
 	let input_focus = $("input:focus, textarea:focus");
 	if (input_focus.length === 0) {
+		event.preventDefault();
 		copyToClipboard();
 	}
 })
 
+$(document).on("cut", (event) => {
+	let input_focus = $("input:focus, textarea:focus");
+	if (input_focus.length === 0) {
+		event.preventDefault();
+		copyToClipboard(true);
+	}
+})
+
+$(document).on("paste", (event) => {
+	let input_focus = $("input:focus, textarea:focus");
+	if (input_focus.length === 0) {
+		event.preventDefault();
+		pasteFromClipboard();
+	}
+})
+
+$(document).on("keydown", (event) => {
+	if (event.ctrlKey && event.key.toLowerCase() === "a") {
+		let input_focus = $("input:focus, textarea:focus");
+		if (input_focus.length === 0) {
+			event.preventDefault();
+			getSelectable().selectAll();
+		} else {
+			event.preventDefault();
+			$(":focus").select();
+		}
+	}
+})
 
 ipcRenderer.on("open", (event, json) => {
 	openFile(json);
@@ -1021,6 +1150,13 @@ ipcRenderer.on("save", (event, create_new_file) => {
 	saveFile(create_new_file);
 });
 
-ipcRenderer.on("copy-to-clipboard", (event) => {
-	copyToClipboard();
+ipcRenderer.on("select-all", (event) => {
+	let keydown_event = jQuery.Event( "keydown", {
+		bubbles: true,
+		cancelable: true,
+		ctrlKey: true,
+		key: "a",
+		code: "KeyA",
+	});
+	$(document).trigger(keydown_event);
 })