New in the SumatraPDF pre-release builds:
Red dot for unsaved changes
A tab with unsaved annotation changes shows a red dot after its title. This replaces the “You have unsaved annotations” message in the toolbar.
Menu bar with tabs in the title bar
When tabs are in the title bar, the menu bar (File, View, …) can now be shown with them: it sits in the title bar row, with the tabs below. Before, showing the menu turned off tabs in the title bar.
Properties window sizes to fit
The Document Properties window sizes itself to its content. Font info loads in the background, so the window opens faster.
More: changes from March 28, 2026 and the full changelog.