notes for Cropping in lightroom:
develop -> click crop icon (right side, top) set aspect -> 1:1 for square usw to delete crop which was applied -> click RESET button (right)
set default crop factor
select all images in library -> quick develop -> set crop ratio now the default should be set
straiten photo
develop -> click crop icon (right side, top) then click on ruler (Angle) icon and drag along a line or click AUTO button in crop tool to straighten image very fast!