[TRMW]
prompt_width=calculated number
From 4.624 you can specify the width, in pixels, to be used for the control that appears within an edit control that has "prompt","calendar" or "spinner" . The default value is 2*x_factor. A larger value may be required if the control is shown on a touch screen.
Note that the size of the prompt control consumes space from the parent control rather than adding to its size. Therefore if you want to set a larger value for this setting you may need to edit some maps to ensure enough room remains for the data for the control.