SumatraPDF Changelog 2026-09-02

← newer 2026-09-02 older →

Tab theme colors

Themes can set separate ActiveTabBackgroundColor and InactiveTabBackgroundColor values (#5959).

A custom theme with a green active tab and gray-green inactive tabs

Thumbnails in the command palette

Type & in the command palette to open a thumbnail grid of the current document, with the current page selected. Page numbers appear as themed badges on the thumbnails.

Command palette in & mode showing a grid of page thumbnails with page number badges

Snap line annotations to 45 degrees

Hold Shift while drawing a line annotation, or dragging a line’s endpoint, to snap it to multiples of 45 degrees (#6125).

Smaller UX improvements

Annotation tooltips no longer show the author unless ShowAnnotationAuthorInTooltip is on.
Selecting several files in Explorer and choosing Open opens them all in one SumatraPDF instance.
Page Up/Down turn pages while you type a range in the Extract / Delete Pages dialogs (#6116).
On the home page, the Command Palette and Keyboard Shortcuts buttons show their shortcut keys in tooltips.
Show in folder uses SumatraPDF’s own file picker when Use SumatraPDF file picker is on.