desktoppr can now control the image scaling and background color for the desktop picture.
The scale and color settings will be set for all screens.
image scaling:
use the scale verb to control how the desktops are scaled. It can have the values fill (default), stretch, center, and fit.
desktoppr scale center
background color:
You can pass a hex string for the background color:
desktoppr color 000000 # black background
desktoppr color FFFFFF # white background
desktoppr color FF0000 # red background