I often work on more complicated models, where I keep backup and reference parts around the model I am making. When I then want to print the part, I have to delete the other parts, click download for 3d printing, and then undo the deleting to get them back. Wouldn't it be great to be able to say "Download selection for 3D printing"? Meaning I would select the thing I want to print, press the button, and only that part would be downloaded as stl file. The same thing applies for 3D models for dual extrusion printers, where the 2 colors need to be separate stl files.
Download selection for 3d printing