thank you

Thanks, no we don't have this. The workaround is to click on the In Model material, switch to the chosen library and then drag the material from the preview bar in the material picker into the library. SU will auto rename the material by appending the next number and you would then have a duplicate (so if the original was named WoodMat then you would now have WoodMat and WoodMat-1). You can remove the WoodMat and rename WoodMat-1. This however does not clear the material from the HD so you would have to manage manually.

Thanks Dave, I agree it's not difficult to go into finder and delete/rename. I did think that you would be able to do it from inside SU as it seems a pretty basic function and therefore I thought I was missing something somewhere (despite looking for a while). Thanks for the confirmation.

Thank you Gaieus. That works great and makes sense now, especially purging unsued objects and I noticed a huge slowdown last night whilst playing around with materials so this would be why. thank you again