To create a control (check box, button, text box, etc. ) select the appropriate control from the mode palette and drag its outline to where you want it to go on the dialog box. All controls have the following attributes:
X, Y Position -- Position in font units from the upper left hand corner of the dialog box.
Reference (Field) name, Id -- Any control added to the dialog can be accessed from inside an application by specifying a "Reference" or "Field" name and/or "Id".
See Also
Selecting, Moving, and Resizing Controls
Cut, Copy, and Paste Applied to Controls
Coordinate System for Positioning Controls