Sorry if this has been discussed before...I couldn't find any thread.... I have imported a STEP file and have an assembly in Alibre. I need to be able to rename each part in the tree but that does not appear to be possible I have even tried saving the Assembly, than tried opening the part file in a separate window thinking it would let me do a Save As to change the part name but that does not work either. Is there a simple way to do this that I am missing. The part Names that come in from Step are just numbers and I need more descriptive part names for the parts that we will be machining. Thoughts? Thanks in advance.