The Redline Polyline command draws polygon objects interactivly on the canvas.
1: Select the command, and all other redline draw commands are locked and rendered with white background.
2: Click to select first corner point:
3: Continue and click corners :
4: Finish with double-click or [Esc], note that the polyline will not close :
5: The command will repeat until the Redline Polyline icon is clicked again, now all other locked draw commands turns gray and are released: