LogInUniV add-on aims to cover all sorts of operators for working with UVs.
If you're looking for ways to make working with UV Editor easier, take a look at UniV, an add-on offering over 20 miscellaneous tools that aim to streamline all sorts of operations for working with UVs.
For example, Quick Snap allows you to transform an island or geometry element by vertex, edge center, and face center. Stack overlaps islands with similar geometry:
Weld connects selected vertices by common vertices, and if there is nothing to connect, it works as Stitch:
Stitch connects islands to each other, preserving the islands' proportions. When called via keymap with sync enabled, the target island becomes the closest:
UniV operators offer much more than meets the eye. Many of them are context-sensitive, varying based on factors like Sync state, selection mode, and whether Ctrl, Shift, or Alt keys or their combinations are pressed.
The add-on is free and available via the Extensions platform, but you can support its developer Oxicid and purchase UniV on Blender Marketplace by clicking this link.
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