Features
Sumatra has a minimalistic design, with its simplicity attained at the expense of extensive features. For rendering PDFs it uses the MuPDF library.
Sumatra was designed for portable use, as it consists of one single file with no external dependencies, making it usable from an external USB drive. This classifies it as a portable application. As is characteristic of many portable applications, Sumatra takes up little disk space. It has a 4.2 MB setup file, compared to Adobe Reader's 36.1 MB. Install size is 8.2 MB, whereas Adobe Reader requires 320 MB of available disk space.
When re-opening a document, the rotation, zoom, window size, page, etc. are remembered from the last time that document was opened, making it behave more like an e-book reader than other PDF viewers.
Sumatra does not lock the PDF file. Without closing the PDF file, a user can save over the PDF and then press the R key to refresh the PDF document. For example, a PDFTeX user could find this feature useful when, after recompiling the altered TeX source code, he/she could simply press 'R' and view the altered document.
The PDF format's usage restrictions were implemented in Sumatra 0.6, preventing users from printing or copying from documents that the document author restricts. Kowalczyk stated "I decided that will honor PDF creator's wishes".
Up to Sumatra 1.1, printing was achieved by transforming each PDF page into a bitmap image. This resulted in very large spool files and potentially slow printing.
Since Sumatra 0.9.1 hyperlinks embedded in PDF documents are also supported.
Sumatra is multilingual, with 69 community-contributed translations.
Sumatra supports SyncTeX, a bidirectional method for synchronizing TeX source and PDF output produced by pdfTeX or XeTeX. Since version 0.9.4, Sumatra supports the JPEG 2000 format.
Read more about this topic: Sumatra PDF
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