Expand Selection

Grow a face selection using coplanar, adjacent-angle, or intersecting-normal rules.

Expand Selection is a face-driven tool that previews results before applying them.

What It Does

The tool evaluates your current face selection and proposes a larger face set using one of three methods:

Method	Best for
`Coplanar`	broad flat regions
`Adjacent`	smooth transitions with a max angle threshold
`Intersecting Normals`	faces whose normals converge on a common target

Using The Dialog

Select one or more faces.
Open Expand selection.
Choose a method and adjust its parameters.
Watch the preview update in the viewport.
Either Select the result or Add to Entity Set.

Method Options

Coplanar

Include Parallel
Select adjacent only
Tolerance (%)

Adjacent

Max angle

Intersecting Normals

Include inverse normals
Tolerance
Allow linear intersection

Typical Failure Reasons

MeshTools disables the final action and explains why when:

no mesh is loaded,
no faces are selected,
the selected faces do not define a valid target for the chosen method,
linear intersection is requested without enough qualifying faces.

Good Practice

Use Add to Entity Set when you are exploring candidate regions and do not want to lose the current working selection.

Shortcuts

Reference the keyboard shortcuts used for viewport controls, selection tools, and editing commands.

Select Similar

Find edge groups that match the shape of the currently selected edge pattern.

On this page

What It Does Using The Dialog Method Options Coplanar Adjacent Intersecting Normals Typical Failure Reasons Good Practice