IBM L40 SX Quick Reference page 69

4. Position the cursor at the desired item and press Spacebar to
display possible selections one by one, then press Enter to save
the selection.
The Set Features Menu consists of two screens as shown in the
following two figures. Using F8 and F7, you can switch from one
screen to the other to select desired items.
Online help is always available when you press F1 on these
screens.
Operating Your Computer 57