Undo and Redo Concepts
AGi32 allows unlimited levels of Undo back to the first command or most recent save. Saving your job files results in compressed, purged databases, which clears the Undo and Redo tables. Switching between Design modes (Model, Reports and Render) does NOT clear the Undo/Redo tables.
Once a command has been completed, it can only be Undone in its entirety. However, within a Command that allows coordinate specification onscreen, you may undo the coordinate specifications as well. For example, if you are creating a polygonal room and mistakenly specified a room vertex, you may undo that vertex.
Note: Arcs are comprised of multiple straight line segments emulating the arc curvature. To undo an entire arc, you will need to undo each line segment in the arc.