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Subtracting from Linework and Profile-Based Objects
Use this procedure to subtract a selected part from linework, AEC Polygons,
mass element extrusions, spaces, or from a block containing any of these
objects, without having to redraw any of the remaining components. You can
also specify the corners of a rectangle as the subtraction. The part to be
subtracted can contain or be delineated by lines, polylines (closed or open),
arcs, circles, text, or hatches. If the subtraction removes part of a closed
polyline, the polyline is recreated as closed. If the subtraction bisects a closed
polyline, both parts are recreated as separate closed polylines. However, in
cases where the subtraction bisects a hatch, the hatch remains a single linework
entity that you can select by clicking either “part.”
NOTE Anything subtracted by this operation is actually deleted from the drawing.
If you only want to hide linework from view, you may want to use the Obscure
command instead. For more information, see Obscuring Regions of Linework on
page 2809.
1 If it does not already exist, draw the linework that delineates what
you want to subtract.
2 Select the linework or object from which to subtract the delineated
part.
3 Click Home tab ➤ Modify panel ➤ ➤ Merge Subtract
drop-down ➤ Subtract .
4 Press ENTER and specify a rectangular shape to be subtracted from
the object.
5 Alternately, select the linework delineating the part you want to
subtract and press ENTER.
6 Press ENTER to keep the selected linework, or enter y (Yes) to erase
it.
2808 | Chapter 35 Detail Drafting Tools
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