Here you can set your Wire Settings.
The Manage Wire Measurements form allows you set the Default Wire Length for Wire Products assigned the Bulk Wire setting.
When you add a Wire Product set to be "Bulk Wire" to a project, the Assign Head End and Bulk Wire Length form will open. Here you can set your Head End for the wire as well as the Length (feet/meters), Terminal Start, and Terminal End.
You can change this default length per Project if desired. From within the Project Editor click Settings->Wire:
Here you can change the default wire length specifically for that Project:
Save as Default will save this value to your default settings in the Control Panel, Restore Default will populate this field with the value from the Control Panel.