The "d" option from the Main Menu is used to delete or disconnect a landmark. LITHOS will ask for the 6 character landmark name and then will give the following menu options.

{{{
Main Menu: Q 0123O IUCRSG NVAMBX DEPL FZH? d
 >d                                                                               
 Input 6-character landmark name. [q]
TEST01
 1. Delete
 2. Disconnect
 q. Quit
1
 Delete ENTIRELY? y[n]
y

 Current landmark = NONE  
Main Menu: Q 0123O IUCRSG NVAMBX DEPL FZH? 
}}}

'''1. Delete:''' Use this option to get rid of an unwanted landmark.
 . '''Delete ENTIRELY? y[n]:''' Entering "y" deletes all traces (.LMK, .MAP, and references in .SUM), while entering "n" or "Enter" will delete nothing and return you to the Main Menu.

'''2. Disconnect:''' This option will remove all overlap and limb information, but will leave all other data intact.