Sets clipping path to the current path.
Clip()Note there is no way to go back to the full page by some command, so what you do is you save the Graphics state and restore it when you want to go out of the clipping path.
Calling the Clip method does not end the current path object, so you need to call either Draw or EndPath if you want to avoid drawing (which you probably usually want to do when setting clipping).
Example: