Entering "p" at the Main Menu will allow you to change how the picture is used by SPC.

Main Menu: Q 0123O IUCRSG NVAMBX DEPL FZH? p
 >p                                                                               
 Input 12-character picture name.
P3T11L2H0201

 0. No change
 1. Tuck it away
 2. Ingore image in Vlm

1. Tuck it away: This will either tuck or untuck a picture. Tucking a picture strips all the landmark information from the SUMFILE and flags in with "!" in PICTLIST.TXT so LITHOS will ignore it when introducing new images. [From LITHOS.f]

2. Ingore image in Vlm: This will flag an image so that it will not participate in the determination of the landmark position Vlm, but will contribute to the determination of topography through its brightness variations. [From LITHOS.f]