Ug8.0 wants to find a fixture, how to quickly delete the potholes of the entity?

Click the Extend and Trim tool buttons.

Zoom in on the selected plane. Click the Extend and Trim Tool button, offset the enlarged plane by a certain distance as needed, and then click the Offset Tool button to trim the solid.

If it is an entity, see if what you need to delete is regular. You can delete some rules by using the feature editing command. Irregular can only be deleted by creating regions or cutting or subtracting entities.