Autodesk 24108-051400-9000 - AutoCAD Revit Architecture Suite 2008 User Manual page 635

4 Enter y (Yes) to erase the original geometry, or enter n (No) to keep the original geometry in the drawing.
NOTE A boolean operation creates a free form mass element. Due to the topological structure of the free form
mass element, its facet deviation cannot be changed. The FACETDEV command will have no effect on an existing
free form mass element.
Dividing a Mass Element
Use this procedure to divide a mass element. The divide plane you specify splits the original mass element into two
separate mass elements.
1 Select the mass element you want to divide, right-click, and click Split.
2 Specify the divide plane start point.
3 Specify the divide plane endpoint.
Dividing a mass element
The original mass element is split along the divide plane, creating two mass elements.
NOTE Dividing a mass element creates free form mass elements. Due to the topological structure of the free
form mass element, its facet deviation cannot be changed. The FACETDEV command will have no effect on an
existing free form mass element.
Trimming a Mass Element
Use this procedure to trim a mass element. The divide plane you specify acts as the trim line, and you specify which
side of the mass element to remove.
1 Select the mass element you want to divide, right-click, and click Trim.
2 Specify the divide plane start point.
3 Specify the divide plane endpoint.
4 Select the side of the mass element to remove.
Editing Mass Elements | 595