Pressing the TAB key in the editor inserts eight (8) space characters by default. If you instead want a TAB character to be inserted, or want to insert another number of space characters, you can specify this in the Tool Properties dialog, in the General / SQL Commander category under the General tab.
Show Special Characters
Sometimes it is useful to render characters that are not visually represented such as whitespace, tab, newline, etc. To do this, make sure an SQL editor is active and then open the Edit meny and toggle Show Special Characters.
Without Show Special Characters enabled:
With Show Special Characters enabled:
The editor shortcuts, or key bindings, can be redefined in the Tool Properties dialog, in the Key Bindings category under the General tab (see Changing Keyboard Shortcuts). Expand the Editor Commands node to manage all editor actions and the Main Menu/Edit node to manage the key bindings for the edit operations in the right-click editor menu and the main window Edit menu.