These controls are in Profile Manager (Options > Element Attributes).
In the Modifiers Panel, switch on Width Stretch and/or Height Stretch. This enables you to resize (increase or decrease the width/height) of the cross-section of the placed profile element.
•To show/hide Stretch lines in Profile Editor, use the Stretch Modifiers control in the Design Layers panel. In this image, they are highlighted in yellow.
•The Stretch Modifiers mark the boundaries of the geometry that will stretch or contract.
–For a Wall, its height or thickness
–for a Beam, its height or width
–for a Column, its cross-section height or width
When you graphically stretch the placed element in either direction, the Stretch Modifiers appear in the model window as feedback.
Stretch Feedback on Stretched Part of Placed Profile
The element’s Settings reflect the stretch in its Height/Width parameter values (hover to see the Nominal and Total values):
See also Nominal Width/Height.
Note: Stretch Modifiers only support profiled Walls, Beams and Columns.