The Rotate PDF feature allows users to rotate pages in PDF documents and set the rotation angle (in 90-degree increments). This is useful for users who need to adjust the page orientation of PDF documents. For example, in scanned documents, users may need to rotate pages for better viewing and printing; in design documents, users may need to rotate design drawings for better display and use. Additionally, this feature can be used to rotate charts or images in PDF documents for better data and information display. By using the rotate PDF feature, users can ensure document content display and use and easily manage and distribute them.