Update a list of diagram shortcuts [Mikheeva] (#155)

* update a list of shortcuts

* add spaces

Author: SvetlanaMikheeva

interface-elements-for-web/articles/diagram/keyboard-shortcuts.md

@@ -8,23 +8,21 @@ The table below lists key combinations available in the **Diagram** tool.
 
 | Shortcut | Description |
 |---|---|
-| Left arrow key | Moves the selected elements one grid cell to the left. |
-| Right arrow key | Moves the selected elements one grid cell to the right. |
-| Up arrow key | Moves the selected elements one grid cell up. |
-| Down arrow key | Moves the selected elements one grid cell down. |
-| Shift + Left arrow key | Moves the selected elements one pixel to the left. |
-| Shift + Right arrow key | Moves the selected elements one pixel to the right. |
-| Shift + Up arrow key | Moves the selected elements one pixel up. |
-| Shift + Down arrow key | Moves the selected elements one pixel down.  |
-| Ctrl+A | Selects all chart elements in the document. |
-| Ctrl+C | Copies the selected elements to the clipboard. |
-| Ctrl+V | Pastes the copied elements from the clipboard. |
-| Ctrl+X | Cuts the selected elements. |
-| Delete | Deletes the selected elements. |
+| Ctrl+X, Shift+Delete | Cuts the selected elements. |
+| Ctrl+C, Ctrl+Insert | Copies the selected elements to the clipboard. |
+| Ctrl+V, Shift+Insert | Pastes the contents of the clipboard. |
+| Ctrl+A | Selects all elements on the diagram page. |
+| Delete, Backspace | Deletes the selected elements. |
 | Ctrl+Z | Undoes the last action. |
 | Ctrl+Y | Redoes the last undone action. |
-| Ctrl+B | Applies bold formatting to the selected text. |
-| Ctrl+I | Applies italic formatting to the selected text. |
-| Ctrl+U | Underlines the selected text. |
+| Ctrl+B | Applies bold formatting to the text of the selected elements. |
+| Ctrl+I | Applies italic formatting to the text of the selected elements. |
+| Ctrl+U | Underlines the text of the selected elements. |
 | Ctrl+Enter | Finishes shape/connector text editing. |
-| F11 |	Switches to full screen. |
+| An arrow key | Moves the selected elements in the specified direction. |
+| Shift + An arrow key | Moves the selected elements one grid cell in the specified direction. |
+| Ctrl + An arrow key | Moves the selected elements one pixel in the specified direction. |
+| Alt + An arrow key | Clones the selected elements. |
+| Ctrl + Mouse Wheel | Zooms into or out of a diagram page. |
+| Space + Left Mouse Button | Pans a diagram page if the **Diagram** tool is focused. |
+| F11 | Switches to full screen. |