Hello, how are you? how do you go about an already imports file?

ssenyonga_mervyn

for example like extrude, creating holes, revolve, and other no usual shapes

bruce_williams

@ssenyonga_mervyn
Welcome to the forum and Onshape!  We use imported geometry all the time.  If your model imports without error and a solid is created, you will have no problem using the standard tools to add or change.  See the on-line tutorials for more help.

scott_holderness

I imported an .stl file but am unable to change the file, ie edit sketch see screen shot thanks for the help

mark_leichliter

.STL is a mesh format, and as such can't be edited like native Onshape geometry.

GWS50

Boolean Plus, by MBARTLETT, is a custom featurescript and is excellent when working with STL's which are notoriously tricky when trying to use in the CAD environment