To Add a ‘New Keyword or Hotkey’ for Inserting Text click File->Add New->Insert menu.
Enter Hotkey, for example ‘Ctrl + Alt + I’.
Select the type of Insert command from the ‘Insert:’ drop down box.
For Insert Text enter Text / Signature / Special Keystroke in the text box.

To insert Special Keystroke like Tab, Home, Page Up , Left Arrow etc, click on Special (F2) or press F2 to open Special keystroke box & create sequence of keystroke using given buttons
For Insert Date/Time select the date/time format from the Date/ Time format drop down.
Enter an optional description. For example ‘Insert Date ' dd/mm/yyyy’.
Select a Category.
Click on Save.