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Cut   Ctrl+X     Cut selected block to the clipboard
Copy   Ctrl+C     Copy selected block to the clipboard
Paste   Ctrl+V     Paste the clipboard to the text
Delete   Del     Delete selected block
Select all   Ctrl+A     Select entire text

Undo   Ctrl+Z     Undo last change
Redo   Shift+Ctrl+Z     Redo last change

To lower case   Alt+Down     Convert word or selected block to lower case
To UPPER case   Alt+Up     Convert word or selected block to UPPER case
Keyboard 1 Keyboard 2   Alt+Left     Convert word or selected block to the first keyboard layout
Keyboard 1 Keyboard 2   Alt+Right     Convert word or selected block to the second keyboard layout

Wrap   Ctrl+W     Wrap/unwrap long lines
Check spelling   F7     Check spelling of text or selected block