Pause the cursor over any sketch entity. The preview shows the section of the entity to delete. Click to delete that section. If the entity does not intersect another entity, the entire entity highlights.
Pause the cursor over any sketch entity. The added section highlights if the entity intersects another entity. If the entity can be extended at both ends (for example, an arc), the end that is closest to the cursor extends. If an entity cannot be extended against another entity, there is no preview, and a click has no effect.