New in the SumatraPDF pre-release builds:
Back / Forward toolbar buttons
The toolbar has Back and Forward buttons. Navigation history now also includes places you scrolled to and stayed on, not only table of contents and link jumps.
Toggle citation hover preview
Toggle Citation Hover Preview (
CmdToggleHoverPreview, command palette) turns the citation hover preview on or off. The CitationHoverDelay setting sets how long you hover before it appears (-1 turns it off).View mode hints and sidebar fonts
Switching the view mode with
Ctrl + 6/7/8 shows a short popup naming the new mode (#5464). Sidebar fonts scale with the app’s font size settings (#5564).-for-testing command-line flag
-for-testing starts a separate instance that doesn’t restore the previous session and doesn’t save settings. It is useful for quick tests.More: changes from June 12, 2026 and the full changelog.