A simple radio button can be used to set whether or not your project is being woven on a rising or sinking shed loom.
If you aren't familiar with these terms, a rising shed loom is the most common. Most jack looms are rising shed. When a treadle is tied to a shaft, the shaft rises when the treadle is pressed.
An example of a popular jack loom that is a sinking shed is the David loom.
If the setting is set to Sinking Shed, the cloth on the drawdown represents the weaving as if the shafts are pulled down by the treadles. The normal "face" view will look the same as the back view on a risng shed loom.