Hi, The Gray stream function interactive-stream-p is "specified" in CLIM. Would it be reasonable to make it return T for most of the extended streams that CLIM provides and NIL for postscript streams (and potentially other batched output streams such as pdf, when a backend for that shows up)? At present I believe it returns NIL for everything. The use case I have is being able to use the same drawing routine for screen and print, customizing behaviour based on the value of (interactive-stream-p stream). Cheers, Christophe