IBM Selectric I/O Manual Of Instruction page 5

Operating Controls
1. Copy Control Lever - To compensate for the thickness of multiple forms, the
copy control lever is provided. As the copy control lever is moved to the rear,
the platen wi II move farther away from the typehead.
2. Index Selection Lever - You may control the indexing (line space movement)
of the platen b)/ setting the index selection lever forward for single space and
back for double space.
3. Paper Re lease Lever - Move the paper release lever forward to position or re-
move paper.
4. Paper Bai I Lever - Holds the paper against the platen to prevent buckl ing.
Should be moved forward when inserting paper.
5. Margin Set
Leve~
- Provides the operator with a means of changing the margin
settings.
6. I ndex Key - Provides vertical indexing of the paper without changing the posi-
tion of the carrier assembly.
7. On-Off Switch - Turns the pri nter on and off.
8. Tab Set/C lear -, Used to set or c I ear tab stops.
9. Margin Release Key - Provides a means of operating the printer beyond the
margin settings without changing the settings.