Use this command to display or hide the map scale along the left and bottom edges of the map.
In the room view, selecting this option will display a measurement scale along the edges of the room.
To change the settings for the frequency and labeling of tick marks for the room measurement scale, right click on the scale and select Draw Scale Properties. You can then enter the steps (in map units) between each tick mark, and how often ticks should be labeled.
This option is also available on the View Settings section of the Layer Control.