Only learnt about hiding objects recently. It sure makes drawing and editing easier.
But.....
I found a problem with it.
In my drawing, I had a part hidden when I saved it and shut down the computer. The next day that part was gone and not retrievable.
What happened there ?
Another thing....
I had drawn a hinge with 3 separate sections that sit touching each other. When I subtracted cylinders to create the screw holes, the 3 hinge parts joined themselves together. Why did it do that ?