The Format menu provides the normal options.
Item Description
Indent Move selected lines right.
Hot Key: Tab
Outdent Move selected lines left.
Hot Key: Shift+Tab
Tab As Spaces Toggle the insert tab as spaces mode on/off.
Comment Block Mark the selected lines as comment.
Hot Key: Ctrl+'
Uncomment Block Removes the comment mark from the selected lines.
Hot Key: Ctrl+Shift+'
Format Code Format the code in the active sheet by indenting (and outdenting) lines properly.
Hot Key: Ctrl+Shift+R