Changes the room's ceiling height. Enter a numerical value or use the MEASURE tool to do it visually. To use the MEASURE tool, hit the MEASURE button.
Then click on the floor, preferably where a wall meets the floor.
Move the mouse all the way to the ceiling.
And click again to set the value.
Hit Protractor Color to bring up a color picker and change the color of the protractor.
Other parameters are not yet implemented in this version.