In the Coordinates Palette, the button next to "r" (radius) and "a" (angle) inputs should be depressed so the delta symbol (small triangle) shows up next to the "r" input. This toggles between Absolute and Relative input.
David
David Maudlin / Architect www.davidmaudlin.com Digital Architecture AC29 USA Perpetual • Mac mini M4 Pro OSX15 | 64 gb ram • MacBook Pro M3 Pro | 36 gb ram OSX14