Width-In-Cells
This style implies that the value specified for the Size property, the one setting the Label control’s width, is expressed in CELLS. It is possible to get the same result writing: "Size value CELLS".
 
Example - Define a label with height and width in cells
screen section.
...
  03 screen-1-la-1 Label
     line 3.5
     column 16.9
     size 26.5 
     lines 3.2
     id 25
     center
     title "This is the main Title"
     height-in-cells
     width-in-cells
     .