There are three main features I require the most from a PDF reader as a student and researcher. The possibility to select text and/or images, the possibility to rearrange the order of the pages, and the possibility of importing pages from a different PDF. The first part works well on OnlyOffice, but the other ones do not really. Apple Preview does a fantastic job on this, in particular, because you only have to drag and drop within or between the thumbnails of PDF files. Linux-based systems do not have really good PDF readers/editors. There are any plans for implementing these functions? maybe soon? Thanks for reading this!