DWGPROPS (Command) Find
For example, you could create a custom property called Project and assign the actual project name as the value. To assign the same custom properties to a group of drawings, create the custom properties in a drawing template file.
Custom properties are displayed in the list of field names in the Field dialog box. You also have access to the properties data using programming interfaces, such as AutoLISP®. (Not available in AutoCAD LT.)
The following options are displayed.
Lists names and values of custom properties for the current drawing.
Displays the Add Custom Property dialog box, where you can enter a name and a value for the new custom property. The name must be unique. The value can be left blank.
Deletes the custom property that is selected in the list.