Mantella - a desktop PDF reader

Added

• Tabs: keep several documents open at once. A sidebar click reuses the preview tab; ⌘-click, middle-click, double-click, or "Open in New Tab" makes it permanent. Switch with ⌘1–⌘9 or ⌃⇥ / ⌃⇧⇥, drag to reorder, close with ⌘W. Open tabs are restored on relaunch.
• Find in document (⌘F): search the text of the open PDF, step through matches with ⌘G / ⌘⇧G or Enter / ⇧Enter, and see every hit highlighted on the page. Each tab keeps its own search.
• Drag the sidebar's right edge to resize it; the width is remembered.
• Collapse the Pinned and Files sections of the sidebar independently.
• Pin and unpin a file straight from its right-click menu in the sidebar.

Changed

• Shortcuts shuffled to make room for tabs: ⌘F is now Find in document, sidebar search moved to ⌘⇧O, opening a pinned file moved to ⌥1–⌥9, and Change library folder… moved to ⌘⇧L.
• Esc in the sidebar search clears the query and returns focus to the document; Enter opens the first result.
• Per-file reading state is keyed by the file's path again instead of its contents, so opening a document is not held up by hashing it. Renaming or moving a file from inside Mantella carries its state along; doing so outside the app now loses it.

Fixed

• Opening PDFs from Explorer on Windows no longer starts a second copy of the app that fights the first over saved state — the running window is focused and gets a new tab instead.

Added

• Manage your library right from the sidebar: create folders, rename files and folders inline, and drag and drop to reorganize — right-click for a New Folder/Rename/Delete/Open in Finder menu, or drag items onto a folder to move them. Deletes go to the Trash/Recycle Bin, with a confirmation prompt first.
• Click the library folder name at the bottom of the sidebar to switch to a different folder.
• Zen mode: a distraction-free, fullscreen reading view that hides the sidebar, toolbar, and bookmark markers. Toggle it from View → Zen Mode; exit with Esc or by leaving fullscreen.

Fixed

• "Open in Explorer" now works on Windows for files and folders whose path contains a space.
• The Windows title bar now follows the app's Light/Dark theme instead of staying stuck in light mode.

Added

• Theme setting in Settings → Appearance: switch between System, Light, and Dark.

Changed

• Manual update checks moved out of Settings and into a "Check for Updates…" item in the app menu, next to About; the update prompt still appears automatically when a new version is found.

Fixed

• On Windows, the app menu's About item is now recognized even with its & mnemonic prefix, so Settings and Check for Updates land in the right place.

Features

• Right-click a file or folder in the sidebar to reveal it in Finder (macOS)/Explorer (Windows)/file manager.
• Full keyboard navigation for the file list and bookmarks panel: arrow keys to move, Enter/Space to open, ←/→ to expand/collapse folders, Home/End to jump to the ends, Esc to return to the document.

Fixes

• ⌘← and ⌘→ now behave predictably: opening a closed panel focuses it, and toggling a focused panel closed hands focus back to the document instead of leaving it stranded.
• The focus ring on sidebar/bookmark rows no longer lit up on mouse clicks — it's now driven by the keyboard cursor instead of native :focus-visible.
• Right-clicking empty space no longer surfaces the native WebView context menu (Reload/Inspect Element).

Features

• PDF library with folder scanning, live sync, search, and pins
• Crisp pdfium rendering with text selection and clickable links
• Reading position, navigation history, and bookmarks saved per file
• Customizable keyboard shortcuts
• Auto-updates via signed, notarized GitHub releases
• macOS, Windows, and Linux builds