2012

Fence
Selects all objects that cross the selection fence. The selection fence is a series
of temporary line segments that you specify with two or more fence points.
The selection fence does not form a closed loop.
Crossing
Selects objects within and crossing a rectangular area defined by two points.
NOTE Some crossing selections of objects to be trimmed are ambiguous. TRIM
resolves the selection by following along the rectangular crossing window in a
clockwise direction from the first point to the first object encountered.
Project
Specifies the projection method used when trimming objects.
None Specifies no projection. The command trims only objects that intersect
with the cutting edge in 3D space.
UCS Specifies projection onto the XY plane of the current UCS. The command
trims objects that do not intersect with the cutting edge in 3D space.
View Specifies projection along the current view direction. The command
trims objects that intersect the boundary in the current view.
TRIM | 1961