Prismatic open channel drawing tool
This tool, , enables you to draw a prismatic channel in the Main Window.
When you select it, the arrow cursor changes to a pencil that draws a channel by clicking on the upstream and downstream end points. (You can enter several channel reaches without having to refer back to the menu by holding down the shift key as you click. If you enter a channel by mistake, this can be deleted.)
To enter data right-click while holding the mouse pointer on any point along the channel. Select Edit Data from the pop-up menu that appears to open the Prismatic Open Channel Data property sheet.