Modernized crop experience: The new circular crop handles improve the crop operation’s legibility on high-resolution touch devices and makes it easy to crop content in a PDF.
You can also use the rotation handle at the top to rotate the content.
Modernized bounding box: The solid bounding boxes for edit operation are now replaced with dotted gray lines that turn blue upon selection. Adobe Acrobat Pro DC 2021 New Features Modernized edit and crop PDF experience
