MODAL allows you to trim more than one entity to a
selected entity. This function is view dependent.

You can perform multiple trimming with one trimming 
entity, and by selecting several entities to be trimmed.

Select the entity to which all selected entities will be
trimmed or extended.

Select an entity (excluding circle), near the intersection
with the trimming entity, on the side of the entity that 
is to remain.

The 2-D intersection is computed, and if an intersection
exists, the selected entities are trimmed or extended to
the projected intersection point.

If the trimming or extending is not correct, press 
(Alt)-(I), or click on Undo in the break area to erase 
the trim or extension.
