PDF Expert is a powerful file manager and an essential tool for every user. It provides a more efficient way to open PDF documents and share them with others. You can view PDFs, edit, add content, remove pages, and even rename PDFs.

The app has support for landscape mode, so it is easier for you to view a PDF while taking a photo or video. It also supports document navigation. You can scroll through the document and jump to a particular page to read it. You can also search within the document and jump to the results. 

Furthermore, the app offers tools for annotation. You can highlight, underline, and strikethrough text.