wayscriber

Wayscriber is a screen annotation tool for Linux Wayland compositors. Written in Rust, it provides a drawing layer that appears over any running application after a single keybind, allowing users to annotate, present, zoom, and capture content before dismissing the overlay.

The tool operates as a native binary without Electron or webviews. It achieves low input-to-draw latency of 8-9 ms at the 95th and 99th percentiles while maintaining 120 FPS by default, with configurable higher rates and vsync off. Around 130 actions can be rebound through a single TOML configuration file. Performance measurements are provided locally with honest labelling.

Installation options include native packages for Debian, Ubuntu, and Fedora, the AUR for Arch, a Nix flake, or standalone deb and rpm downloads. After installation, the daemon runs as a user service that can be enabled with systemctl, and a global shortcut is bound to the daemon-toggle command, which a configurator can set up automatically. The overlay includes pen, shapes, text, multiple boards, zoom functionality, searchable help accessible via F1, and dismissal via Esc.

It supports Hyprland, Sway, River, Wayfire, Niri, COSMIC, and KDE Plasma, with GNOME supported subject to caveats. Wayscriber is free and open source under the MIT license.