Use the Trim PropertyManager to select a trim type and control other trimming options.
You can trim any 2D sketch.
To open the Trim PropertyManager:
- Right-click a sketch and select Edit Sketch.
- Click Trim Entities
(Sketch toolbar) or .
The Trim PropertyManager includes the following options:
Power Trim
Select
Power Trim 
to do the following:
- Extend sketch entities.
- Trim single sketch entities to the nearest intersecting entity as you drag the pointer.
- Trim one or more sketch entities to the nearest intersecting entity as you drag the pointer, and cross the entity.
Video: Power Trim - Trim
Corner
Select Corner 
to modify two selected entities until they intersect at a virtual corner.
Factors governing the
Corner trim option include:
- The sketch entities can be different.
- The trim operation can extend one sketch entity and shorten the other, or extend both sketch entities.
- Behavior is affected by which end of the sketch entities you select.
- Behavior is not affected by the order in which you select the sketch entities.
Trim away inside
Select
Trim away inside 
to trim open entities that:
- Cross two selected boundaries.
- Exist between two selected boundaries.
- Exist within a closed sketch entity.
Factors governing
Trim away inside include:
- The sketch entities you select as the two bounding entities can be different.
- The sketch entities you select to trim must either:
- Intersect each bounding entity once.
- Not intersect the two bounding entities at all.
- The trim action removes any valid sketch entities inside the selected boundaries.
- Only open sketch segments are valid sketch entities to trim.
Trim away outside
Select
Trim away outside 
to trim open entities that exist outside two selected boundaries. Factors governing
Trim away outside include:
- The sketch entities you select as the two bounding entities can be different.
- Boundaries are not limited by the endpoints of the sketch entities you select.
- The trim action removes any valid sketch entities that lie outside the selected boundaries.
- If the sketch entity to trim intersects either of the bounding entities once:
- It trims the section outside the bounding entity.
- It extends the section inside the bounding entity to the next entity.
- Only open sketch segments are valid entities to trim.
Trim to Closest
Select
Trim to closest 
to trim or extend the selected sketch entities. Factors governing
Trim to closest include:
- Remove the selected sketch entity up to the closest intersection with another sketch entity.
- Extend the selected entity. The direction in which the entity extends, depends on the direction you drag the pointer.
Video: Trim to Closest