More simple AutoCAD tips, as promised:
- If you erase some objects, draw a few things and then want your erased objects back without losing the things you drew in the meantime, enter OOPS rather than undoing the commands.
- At any Select objects: prompt, you can select using a triangle, non-orthogonal rectangle or other odd shapes, by entering the WPolygon (WP) or CPolygon (CP) options.
- If you have a paper space viewport entirely inside another one, it can be hard to make that viewport current just by picking in it. Try Ctrl+R to cycle through viewports instead.
- Move some objects, rotate them to match something and optionally even scale them to match too, all with the ALIGN command (Modify > 3D Operations > Align). Despite the menu location, this command is great for both 2D and 3D work.
- The ID command tells you where a point lies in space. In many cases you can do that without a command. Select the object, hover over a grip, look at the coordinate display in the bottom left corner. For this to work, the coordinate display can’t be frozen. If it is, double-click on it to free it up.