https://forums.autodesk.com/t5/fusion-manufacture-forum/closing-without-saving/m-p/6257475#M156774 In the Preferences &gt; General &gt;, there's a check box for 'Automatic Version on Close'. If this is disabled, you will not get the version. Thu, 07 Apr 2016 14:16:51 GMT dave.anderson 2016-04-07T14:16:51Z https://forums.autodesk.com/t5/fusion-manufacture-forum/closing-without-saving/m-p/6257434#M156773 <P>How do I set up Fusion to not automatically save when closing a tab? Sometimes I have a CAM setup that is running well on the machine, but I want to play "what if" and evaluate different tools, operations, etc in Fusions CAM workspace. Since the existing job is running fine, I don't want to overwrite it and lose the "working" setup while playing around. I know the easy answer is to copy the file and mess around with the copy, but sometimes I forget to do this, and start messing with my "good" file. In other programs, I can just close the tab/window, and a pop-up dialog box will ask if I want to save my changes or discard them. Fusion sems to be a little rude here, and just saves the new data without asking.</P> Thu, 07 Apr 2016 13:54:40 GMT https://forums.autodesk.com/t5/fusion-manufacture-forum/closing-without-saving/m-p/6257434#M156773 Anonymous 2016-04-07T13:54:40Z https://forums.autodesk.com/t5/fusion-manufacture-forum/closing-without-saving/m-p/6257475#M156774 In the Preferences &gt; General &gt;, there's a check box for 'Automatic Version on Close'. If this is disabled, you will not get the version. Thu, 07 Apr 2016 14:16:51 GMT https://forums.autodesk.com/t5/fusion-manufacture-forum/closing-without-saving/m-p/6257475#M156774 dave.anderson 2016-04-07T14:16:51Z https://forums.autodesk.com/t5/fusion-manufacture-forum/closing-without-saving/m-p/6257931#M156775 <P>Hunh! Looked right past it. Thanks!</P><P>&nbsp;</P> Thu, 07 Apr 2016 17:08:06 GMT https://forums.autodesk.com/t5/fusion-manufacture-forum/closing-without-saving/m-p/6257931#M156775 Anonymous 2016-04-07T17:08:06Z