FS (Fast Select) selects lines, polylines, circles, arcs, attribute definitions, text,
mtext, ellipses, and images.

The behavior of FS is controlled with FSMODE:

• If FSMODE is set to OFF (the default), FS selects only those objects that are touching
  the selected object.
• If FSMODE is set to ON, FS selects all the objects that are touching the selected
  object as well as any objects that are touching those objects. The selection process
  continues down the chain of unselected objects that are touching the selected object
  until no more unselected objects are visible in the drawing area.

Example 1: FS used to select objects with FSMODE turned off:

Example 2: FS used to select objects with FSMODE turned on:

File

fastsel.lsp