Compares a specified drawing file with the current drawing file, highlighting the differences with color within revision clouds.
Find
Displays the Select a Drawing to Compare dialog box. After you specify a comparison drawing, the DWG Compare toolbar is displayed and docked at the top of the drawing area.
The COMPARE command provides you with a visual comparison between the current drawing and a specified comparison drawing. Typically, these are different revisions of a drawing, which you can then review and modify.
For detailed information about the commands and options available in the comparison state, see the topic, DWG Compare Toolbar linked below.