Hi Ella,

> Would the command-specific undo bind to the standard undo keystroke?

Yeah command-specific undo can be set by a command so that if an undo is triggered (by whatever method - either by ctrl+z or by clicking on the undo button), it will receive a custom event for it rather than the standard undo happening.

Attached here is another updated version of the ConstructionLine command that now has a command-specific undo set on it, so with this version you can hit Ctrl+Z or the undo button on the bottom toolbar to remove the last placed cline.

- Michael