Switch to 3 lines mode, or edit your favorites list and remove the information you dont want displayed from the fields it displays would be my only suggestion.
The number of lines displayed is not user controlled in the 436 (no three line mode like in the 536) but on about page 54 in the manual you should find how to toggle Unit ID display or Channel Service Type display.
Of course with a Favorites List you can tailor what you wish to have shown text wise but the number of lines that will be displayed cannot be changed AFAIK.