This command extends an arc entity.
Pick arc to extend: select an arc entity
Break Arc at Extension [Yes/<No>]?
N Answering Yes will create a new arc starting at the
end of the existing arc.
Enter or pick the distance to extend:
5 This extends the arc 5 units
Enter or pick the distance to extend ('U' to Undo): press
Enter to end
Pulldown Menu Location: Edit > Extend
Keyboard Command: extarc
Prerequisite: An arc
File Name: \lsp\scadutil.arx