User Guide: Edit

Symmetry Find Off/On [Professional Version Only]: If parts of your mesh have mirrored topology, you can use the Symmetry tool to speed up cut'n'weld operations. Click on the Find button, then LMB click on any edge that sits on the mirror line (i.e. the line that divides the two symmetrical halves), then tap the space bar to continue; if all goes well, one half of the mesh will be shaded darker than the other, indicating that symmetry editing is now active; non-symmetrical polys are shaded yellow. Cut, weld, detach, attached, drop and undrop actions from then on will be mirrored across to the other half. Click on the Off button if you want to turn that mirroring off.

If parts of your mesh are symmetrical but detached (e.g. a pair of shoes), first LMB click on any edge in one shell, then MMB click on the mirrored edge in the other shell, then tap the space bar to continue.

Copy UVs Stack/U/V [Professional Version Only]: To copy UVs between parts of your mesh, first click the Copy UVs button, then LMB select an edge in the source shell (i.e. the shell you want to copy UVs the from); you can select this edge in either the UV or 3D views. Next LMB select edges, in the same relative position, for the target shells; by selecting multiple edges, you can copy to more than one shell at a time. Tap the space bar when you have selected all the edges and the UVs will be copied across if the selected shells match. To match, shells must have the same topology (i.e. the same number and arrangement of polygons). Before copying, select Stack if the you want the target shells stacked on top of the source shell, or U or V if you want them arranged alongside.

Edge Extend 0/1/10: Select the look-ahead range for cut'n'weld operations. Click on the Edge Extend button itself to unselect all red or yellow highlighted edges.

Auto Fit/Off: When Auto Fit is on, all current UVs are re-normalized (scaled to fit in the 0 to 1 range) every time a UV shell is moved or modified. When Off, they aren't, so you can move shells beyond this range and out onto other tiles. Use the + and _ keys to scale the UV unit box up and down.

O/C/N [Professional Version Only]: When O is selected the original (pre-v1.9) flattening algorithm is used for all flattening calculations. When C is selected, a more recent method is used. When N is selected, the newest method is used; it handles long thin polys better. The older methods are made available in case the newer methods fail for some reason.

4/5/6 Local Scale / Pin: When Local Scale is selected, the 4/5 hotkeys paint a local scaling into the polys under the brush; this has the effect of moving the UVs in that area in or out during any further flattening, while preserving the shape of the polys as much as possible.

When Pin is selected, the 4/5 hotkeys simply move the UVs in or out directly, disregarding any shape constraints and most likely reducing the quality of the UVs in that area. The UVs are pinned so that any subsequent flattening of that shell doesn't affect the new UV positions. Also when in this Pin mode, the 6 hotkey can be used to smooth UVs.

Smooth Boundary: When smoothing UVs using the 6 hotkey, this option determines whether shell boundaries are modified.

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 ; Auto Fit/Off : When '''Auto Fit''' is on, all current UVs are re-normalized (scaled to fit in the 0 to 1 range) every time a UV shell is moved or modified. When '''Off''', they aren't, so you can move shells beyond this range and out onto other tiles. Use the + and _ keys to scale the UV unit box up and down.
-; O/C/N {{Pro2|pro5|User_Guide:_Optimize#pro5}} : When '''O''' is selected the original (pre-v1.9) flattening algorithm is used for all flattening calculations. When '''C''' is selected, a more recent method is used. When '''N''' is selected, the newest method is used; it handles long thin polys better. The older methods are made available in case the newer methods fail for some reason.
+; O/C/N {{Pro2|pro5|User_Guide:_Optimize#pro6}} : When '''O''' is selected the original (pre-v1.9) flattening algorithm is used for all flattening calculations. When '''C''' is selected, a more recent method is used. When '''N''' is selected, the newest method is used; it handles long thin polys better. The older methods are made available in case the newer methods fail for some reason.
 ; 4/5/6 Local Scale / Pin : When '''Local Scale''' is selected, the 4/5 hotkeys paint a local scaling into the polys under the brush; this has the effect of moving the UVs in that area in or out during any further flattening, while preserving the shape of the polys as much as possible.