The lack of this feature in the previous versions was one of the big reasons why some people were still hesitant to completely switch to Sumatra PDF.Įvery time you highlight text, a message appears at the toolbar area that reminds you to save the annotations. The most important thing from this annotation capability is that you can highlight text. Since Sumatra PDF 3.3, you can also add, edit, and remove annotations in PDF files. When you open the same file again, it jumps directly to the page so that you can continue reading from where you left. What makes Sumatra PDF even more convenient to use is that it has the capability to remember the page that you read. There is no need to open File Explorer to search the file. This means you can just open Sumatra PDF and click on the thumbnail to read the same file. The most recent PDF files that you open are displayed as thumbnails at the front page of Sumatra PDF. If you want to read without any distraction whatsoever, just hit the F5 button to get into the Presentation mode which displays the document against a dark background. There is the full screen mode that eliminates all of the visual elements but the bookmark and document area. The toolbar, scrollbar, and bookmark can be hidden, which frees up even more space so that you can read more conveniently. It is also where you can find the menu button. The title bar is used to display the multiple tabs when you open more than one document.

The title bar, the toolbar, and the document area. The graphical interface is simple which mainly consists of three areas.

The main focus of Sumatra PDF is to view PDF files, but it can also be used to read other formats such as DjVu, XPS, CBZ, ePub, CHM, Mobi, and CBR files.

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