Symmetrize UV Tool

The Symmetrize UV Tool lets you mirror components in the UV Editor across the U or V axis. The line of symmetry is displayed as a bold line.

To open the Symmetrize UV Tool, select it from the Transform > Tools section of the UV Toolkit or select Tools > Symmetrize from the UV Editor menus.

The following options appear in the Tool Settings window when you select Tools > Symmetrize > .

Brush Options

Size
Specifies the size of the affected area. You can also control this by holding B + middle-dragging in the UV Editor.
Mirror Axis
Specifies whether to mirror UVs in the U or V axis.
Mirror Axis Position
Specifies the line of symmetry for the affected UVs in UV space. You can also control this by Ctrl + middle-dragging in the UV Editor.
Mirror Axis Increment
Specifies how far to snap the Mirror Axis Position from its last position when Ctrl + middle-dragging. Setting this value to 0 disables snapping.
Flood Shell
Mirrors the entire shell under the brush. You can also control this by Ctrl + dragging in the UV Editor.
Note: This works across multiple shells.