Contents: Download · Quick Start · Features · Shortcuts · Feedback · Development

Download

Download Latest Release — pick the installer for your platform from the assets list. Windows also ships a portable zip (*_x64_portable.zip): extract and run — config stays under data\ next to the exe (no AppData).

Windows users can also install the Microsoft Store version with WinGet:

winget install --id 9N6623X973JV --source msstore

Official downloads are GitHub Releases and Microsoft Store. Third-party mirrors may be outdated or repackaged.

Quick Start

1. Install and launch — MarkerOn runs in the system tray; no window appears.
2. Enter annotation mode — press Ctrl + Shift + D (Command + Shift + D on macOS).
3. Draw, then click through — use number keys and V (Select) for tools; press X to interact with apps below while keeping annotations visible; press Esc to exit.

New here? Press Space for the toolbar. See Keyboard Shortcuts for the full list.

Features

• Lightweight & fast — ~1.5 MB installer (Rust + Canvas), minimal memory; runs quietly in the system tray (no extra daemons or telemetry)
• Annotate anywhere — draw over any app, including the taskbar
• 11 tools — select, pen, highlighter, laser, arrow, rectangle, ellipse, line, eraser, text, stamp
• Marquee batch edit — press V for Select: box/click select, group drag, Delete to remove
• Flexible toolbar — press Space to toggle, or enable always-on in Settings; compact panel with Expand for full options, undo, copy, and whiteboard actions in-panel; independent floating window with drawing / click-through toggles
• Click-through mode — interact with apps below while staying in the session; toggle via toolbar buttons, Ctrl+Shift+X (global), or X while drawing; disabled in whiteboard mode
• Full keyboard control — every action has a shortcut, no menus needed
• Preserve drawings — enable Keep after exit under Whiteboard & content to resume on re-enter
• Whiteboard mode — set default entry to whiteboard, or press W to toggle; content rules are in Whiteboard & content settings
• Whiteboard copy — copy the whiteboard as an image with Ctrl/Command + C

Keyboard Shortcuts

On macOS, use Command (⌘) in place of Ctrl, and Option (⌥) in place of Alt.

Global Shortcuts

Action	Windows	macOS
Toggle annotation mode	Ctrl + Shift + D	Command + Shift + D
Clear all annotations	Ctrl + Shift + C	Command + Shift + C
Toggle click-through mode	Ctrl + Shift + X	Command + Shift + X

Tool Switching

Key	Tool	Key	Tool
V	Select	5	Ellipse
1	Pen	6	Line
2	Highlighter	7	Eraser
3	Arrow	8	Laser
4	Rectangle	T	Text
		N	Stamp

Common Actions

Action	Windows	macOS
Toolbar (toggle)	Space	Space
Delete selection	Delete / Backspace	Delete / Backspace
Click-through (while drawing)	X	X
Cycle eraser mode (stroke / object)	7 again while eraser selected	7 again while eraser selected
Toolbar always-on / layout	Settings → General	Settings → General
Copy screen / whiteboard	Ctrl + C	Command + C
Whiteboard toggle	W	W
Undo / Redo	Ctrl + Z / Y	Command + Z / Y
Stroke width	Ctrl + Scroll	Command + Scroll (pen, laser & shapes share; highlighter/eraser/text separate)
Exit	Esc	Esc

All shortcuts

Drawing with Modifier Keys

Draws	Windows	macOS
Current tool (default: pen)	Drag	Drag
Line	Alt + Drag	Option + Drag
Rectangle	Ctrl + Drag	Command + Drag
Square	Ctrl + Alt + Drag	Command + Option + Drag
Ellipse	Shift + Drag	Shift + Drag
Circle	Shift + Alt + Drag	Shift + Option + Drag
Arrow	Ctrl + Shift + Drag	Command + Shift + Drag

Edit & Move

Action	Effect
Select tool (V)	Marquee or click to select; drag selection as a group; Delete / Backspace to remove; Esc clears selection
Element dragging	In General settings: Off / Hover drag / Hold Ctrl to drag
Double-click existing text	Re-enter edit mode for that text
Double-click empty area in T mode	Create a new text input at cursor position

Color Switching

Action	Effect
Q / E	Previous / Next color
Right-click	Hold to erase; release restores the previous tool

Other

Action	Windows	macOS
Redo (alt)	Ctrl + Shift + Z	Command + Shift + Z

Advanced settings

In Settings → General (toolbar display, click-through, and stroke width — see Features):

• Whiteboard & content — default entry (screen / whiteboard), keep after exit, keep on W toggle
• Element dragging — off, hover to drag, or hold Ctrl/Command to drag (disabled while eraser is selected)
• Eraser mode — stroke (local erase) or object (delete whole elements); with eraser selected, press 7 again (or click the toolbar eraser again) to switch
• Angle snap step — snap interval for straight lines drawn with Alt
• Auto start — launch the app automatically at system startup

Feedback & Issues

• Bug reports: Settings → Diagnostics → export a report, then open a GitHub Issue
• Privacy: PRIVACY.md

Development

See CONTRIBUTING.md for prerequisites, setup, and the full workflow. Stack: Tauri v2 · Vue 3 · Vite · TypeScript · Canvas API