uv pack islands to fit/cover all area I have uv layout like in the image. I just want to force it to occupy the empty area in the right (Right now it's only cover the left area) . How can do this ? but keep the overal rough shape without making all become square. So basically just like to scale it X direction but do it automatically to fit the space.

Thanks

blend file :
https://drive.google.com/drive/folders/18DxOHq_wxzXHrv7gVvsswGNwl8D-4Lwe?usp=sharing
Choose Top Ortho view, enter in Edit mode, select the whole mesh, press U > Project From View, and click on the Scale to Bounds option on the bottom of the left menu (displayed with T), or choose directly Project From View (Bounds).