Hi quaritexa,one way (in v4) is that you can set up a shortcut key that will run the Extrude command and set those controls to a specific value. To do that you add parameters after the command name in the shortcut key.

To run Extrude with "cap ends" always enabled, set this as your shortcut key:

Extrude capends=true

For "both sides" set this:

Extrude bothsides=true

To do extrude tapered with one shortcut key do this:

Extrude tapered

- Michael