Use this procedure to manually add gridlines and specify an offset for each one when you need to create a unique grid that does not fit into any of the other division types. You can also start with a fixed cell dimension grid or a fixed number of cells grid and then manually adjust the gridlines to suit your needs.

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 Door/Window Assembly Styles. 
  
  
 . Insert as many grid lines as you need. If you need to remove a grid line, select it from the table, and then click 
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| If the orientation is… | Then… | 
|---|---|
| horizontal | specify an offset distance in Bottom Offset or Top Offset. | 
| vertical | specify an offset distance in Start Offset or End Offset. |