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      . |