The behavior of FASTSELECT can be controlled with the command FSMODE. If FSMODE is set to ON (the default), FASTSELECT selects only those objects that are touching the selected object. When FSMODE is OFF, FASTSELECT selects all the objects that are touching the selected object as well as any objects that are touching those objects. The command continues down the chain of unselected objects that are touching the selected object until no more unselected objects are visible on screen.

Command: 'FS
Select touching object: Select an object

Command: 'FSMODE
FASTSEL chain selection <OFF>: Enter ON or OFF

Usage Example:

FASTSELECT used to select objects with FSMODE turned off:

FASTSELECT used to select objects with FSMODE turned on: