When the Modeling Toolkit is active, transform constraints let you slide components along the edges or the surface of the active mesh.
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Off
- Disables transform constraints. Lets you use the transform tools to translate, rotate, or scale your components without a constraint.
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Edge Slide
- When one of the transform tools is selected, slides the selected components along the edges of the active mesh.
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Surface Slide
- When one of the transform tools is selected, slides the selected components along the surface of the active mesh.