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ifer47

markeron

ifer47

A lightweight (~1.5 MB) open-source screen annotation tool with click-through mode and keyboard-first shortcuts, built for demos, teaching, meetings, and screen recording.

v2.11.1
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11d ago
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Synced at
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rustwindows

Latest release

v2.11.1Oct 8, 2026, 01:35 AM
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README

Project Overview

MarkerOn is a lightweight (~1.5 MB) open-source screen annotation tool. Press a hotkey to instantly draw, highlight, and annotate anywhere on your desktop, built for demos, teaching, meetings, and screen recording.

Key Features

  • 10 tools: Pen, highlighter, laser, arrow, rectangle, ellipse, line, eraser, text, stamp
  • Click-through mode: Interact with apps below while keeping annotations visible
  • Full keyboard control: Every action has a shortcut
  • Flexible toolbar: Toggle with Space, or enable always-on
  • Whiteboard mode: Press W to toggle whiteboard mode
  • Preserve drawings: Enable "Keep after exit" to resume on re-enter

Target Audience

  • Instructors and trainers who need screen presentations and annotations
  • Meeting hosts and screen recorders
  • Remote collaboration teams

Quick Start

  1. Download from GitHub Releases
  2. Launch the app — it runs in the system tray
  3. Press Ctrl+Shift+D (Command+Shift+D on macOS) to enter annotation mode
  4. Use number keys for tools, press X to click through, Esc to exit

Core Advantages

  • Extremely lightweight: ~1.5 MB installer (Rust + Canvas)
  • Privacy-friendly: No telemetry, no extra daemons
  • Open-source & free: MIT licensed

Release history

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