Trims are available on the single entity toolbar.
TRIM commands trim or extend selected entities. The trim commands are helpful when you wish to manipulate entity endpoints, especially where they might intersect with other entities. Entities that can be trimmed include lines, paths, arcs, elliptical arcs, and splines. Trim will extend paths (but not splines) past their endpoints. Points, text, dimensions, and closed entities cannot be trimmed.
Trims: