Add //inset and //outset commands to adjust the selection (replacing 3 expands or 3 contracts). The command should have an option to only inset/outset vertically or horizontally.

Perhaps also extend the //expand and //contract, to support additional arguments.

Example:

• "//expand 2 2 e 2 2 s"
• "//contract 2 d 2 e 2 s"