Adding a rack ruler
  | 
           Tool  | 
        
           Tool set  | 
      
| 
           Rack Ruler 
  | 
        
           Layout  | 
      
The rack ruler measures the height of equipment racks by placing a 2D ruler on the drawing with both drawing unit and rack unit markings. The ruler measurements are displayed in the units specified in the document settings (see Units settings: Dimensions pane).
To place a rack ruler:
Click the tool.
Click Preferences to specify the tool’s default parameters. The parameters can be edited later from the Object Info palette.
| 
           Parameter  | 
        
           Description  | 
      
| 
           Height (RU)  | 
        
           Sets the height of the rack ruler in rack units  | 
      
| 
           Base Offset  | 
        
           If the rack ruler measurements should be offset from the base of the equipment rack, enter the offset value  | 
      
Click once to place the rack ruler; click a second time to set the rotation.

