The Options commands allow you to customize a variety of settings that affect the calculations in your project and appearance of your drawings.
See the General Customization Commands section for more information about how the Edit Project List, Edit Standards List, Copy Project List to Standards, and Copy Standards List to Project commands work.
To edit the options project list, go to
Ribbon: DMH: Customization->Project Customization-> 
Options
Pulldown Menu: DM HVAC->Customization->Options->Edit Project List
To edit the options standards list, go to
Ribbon: DMH: Customization->Master & Standards Customization-> 
Options
Pulldown Menu: DM HVAC->Customization->Options->Edit Standards List
Design Master HVAC Options Dialog Box
The Design Master HVAC Options dialog box contains a list of all of the options and their current settings. The options are arranged in groups in the list.
Editing a Setting
To edit an option setting, select the Value in the list and enter a new value.
Press the OK button to save your changes.
If the change you made to the options does not immediately appear on the drawing, run the Coordinate Drawings and Database command. This command will update the drawing to use the new settings you have specified.