Open the screen message (for example, FileBrowse_1.sfmxsd) with the screen message editor (see Opening a screen message).
Activate the Screen Descriptions tab of the screen message editor by clicking the Screen Descriptions tab (Screen Descriptions tab).
To add a descriptor to a screen description:
On the Screen Descriptions tab, right-click the screen description to which you want to add a descriptor.
Select the type of descriptor that you want to add (see Types of screen descriptors).
Follow the instructions in the online help for the type of descriptor that you want to add to the screen description (see Types of screen descriptors).