Splitting Elements Automatically
Before you begin to draw, switch on Splitting in the Setup menu to automatically split elements at their intersection points. This technique keeps contours clean, which is important for automatic hatching.
When a new element is created, Creo Elements/Direct Drafting checks to see if one of the end points of the new element lies on other elements. If so, it splits the other element at that point if possible. When the new element crosses the old element, the old element will not be split.
Following figure shows the principle of splitting elements.
Splitting Elements
 | If you are deleting an element whose end point lies on other elements and Splitting is active, Creo Elements/Direct Drafting will attempt to merge the remaining elements automatically into one. |