Width-In-Cells
This style implies that the value specified for the Size property, the one setting the IWC-Panel control’s width, is expressed in CELLS. It is possible to get the same result writing: "Size value CELLS".
 
Example - Define an iwc-panel with width in cells
screen section.
...
  03 screen-1-ip-1 Iwc-Panel
     line 17.7
     column 20.0
     size 24.3 cells 
     lines 27.8
     id 16
     js-name "f-map"
     width-in-cells.