LINES {IS} height {= }
Typically, the height field represents the logical height of the control. Frequently, this is based on the size of the control's title or value. For example, a LABEL control's height of 1 would specify a one-line label. If this phrase is omitted, the control type employs its own method of determining a default size.
LINES = 15 CELLS
causes the control to have a height of 15 cells, where the exact height of a cell is inherited from the parent window.
LINES = 60 PIXELS