Panels may be set up so that they appear as layered file folders, giving the user easy access to different sub-panels within the window. This effect is achieved via the Folder control, which links and displays previously defined sub-panels using a tabbed or tabless (wizard style) format. See Creating Folders below. Users can navigate between sub-panels by clicking on a tab, using the Alt key, or pressing the arrow keys while focus is on the Folder control.
NOMADS stores the name of the currently active folder control in the folder_id$ variable and stores a reference for each tab/sub-panel in a variable named FLDR.subpanelname.CTL.
You can use this variable to refer to a sub-panel in your program. The following restrictions apply to folder controls:
To draw folders on your panel, select the Folder control tool from the Controls Toolbar. Hold down the left mouse button and drag the mouse to create a rectangle to the desired size. Release the mouse button to create a new empty folder control.
Sub-panels are added to a folder control using the Tabs/Folder Properties dialogue. See Folder Properties and Adding and Modifying Sub-Panels.
For making other adjustments, see Modifying Objects.