line thickness

Good morning from Greg Bennett I should like to reset the line thickness element of (medium-line-style *some-pane*) without essentially copying its other elements as arguments to (make-line-style new-one), making new-one's thickness my desired value, and then executing (setf (medium-line-style *some-pane*) new-one). I have a copy of the CLIM2 UG (ver 2.2.2 2005) and have not managed to discover a direct way to do this. Probably I'm not looking in the right place. Thanks for any ad all assistance Cheers /GB