To modify a resource that has already been defined, click from the menu bar. The Project Resources window opens.
Select the resource from the list of Existing Resources. At this point, the Modify… and Delete buttons become enabled.
Click the Modify… button.
The Resource Properties window opens, showing the several resource fields filled in accordingly.
After making any changes, click the Update button and the Resource Properties window will reset.
Click the Exit icon 
to close the Resource Properties window.
Note: The Update button must be clicked before clicking the Exit icon . Otherwise, the change will not be saved.