Go toEdit > Preferences > Addons > Installand either select .zip file or the unzippeduv_squares.pyfile. Location UV Editor > N Panel > UV Squares Support If you need help with the addon or you want to support me back please do so over BlenderMarket ️:https://blendermarket.com...
Reshape selected UV faces (quads) to grid of either: equivalent squares (each square area is the same) or by respect to shape of an active quad (area of rectangles can differ but they fit into straight lines) convert multiple islands at once (select more than one separate UV chunk) ...