Use this procedure to automatically resize cells in a grid when the result of dividing the grid by the specified cell dimension is not a whole number.
For example, if a vertical primary grid in a curtain wall unit style is 17 feet in length and you specify a fixed cell dimension of 3 feet, the grid has five cells of 3 feet each with 2 feet remaining. Using the Auto-Adjust Cells option, you can specify how the grid distributes the remaining quantity.
- Click
. 
- Expand Architectural Objects, and expand Curtain Wall Styles.
- Select a curtain wall unit style.
- Click the Design Rules tab.
- In the left pane, select Divisions under Element Definitions.
- Select a Divisions definition or create a new one.
- Select Fixed Cell Dimension as the division type.
- Select Auto-Adjust Cells, and specify the cell adjustment:
If you want to … Then … add the remaining space to grid cells select Grow, and select the specific cells to which you want the space added. remove the remaining space from grid cells select Shrink, and select the specific cells from which you want the space removed. You can then select Maintain at least half of cell dimension in order to control the cell shrinkage. The cells that you do not select maintain the fixed value you specified for Cell Dimension.