Top Bar
The Top Bar contains transport controls, playback settings, and access to the main menu.
Layout
From left to right:
| Element | Description |
|---|---|
| Play/Pause | Start or pause playback |
| Stop | Stop playback and reset to beginning |
| Volume | Adjust playback volume |
| Reset View | Center workspace on BaseNote |
| Tracking | Toggle playhead tracking mode |
| Menu | Open the main menu |
| Lock | Toggle note editing lock |
Transport Controls
Play/Pause Button
A single button that toggles between states:
- Play (▶): Starts playback from the current position
- Pause (⏸): Button transforms to pause icon during playback; click to pause
- Resume: Click the play button again to continue from where you paused
Stop Button
- Stop (■): Halts playback completely
- Reset: The playhead returns to the beginning (time = 0)
Volume Slider
- Range: 0 (muted) to 1 (full volume)
- Real-time: Adjustments take effect immediately during playback
TIP
Start with a lower volume when exploring new modules - some can be surprisingly loud!
View Controls
Reset View Button
- Function: Centers the workspace on the BaseNote
- Disabled when: Playhead tracking is enabled (tracking controls the view)
Tracking Toggle
When enabled:
- The workspace automatically scrolls to keep the playhead centered
- Reset View button is disabled
- Useful for long compositions
When disabled:
- The workspace stays fixed
- Playhead moves across the static view
- You can pan and zoom freely
Main Menu
Click the hamburger icon (☰) to open the main menu.
Menu Options
| Option | Description |
|---|---|
| Undo | Undo the last change |
| Redo | Redo the last undone change |
| Reorder Module | Reindex notes by start time (measures first, then notes) |
| Save Module | Export the current module as JSON |
| Load Module | Import a module from file (replaces current workspace) |
Undo/Redo
- Undo (Ctrl/Cmd + Z): Reverts the most recent change
- Redo (Ctrl/Cmd + Y): Reapplies an undone change
- History limit: Up to 50 states are remembered
Save Module
- Click Save Module
- A JSON file (
module.json) downloads to your computer
Load Module
Opens a submenu with options:
| Option | Description |
|---|---|
| Load from file | Opens a file picker to select a JSON module |
| Reset to Default Module | Loads the built-in default composition (Bach's Neverending Canon) |
WARNING
Loading a module replaces the current workspace content. Save your work first if needed!
Lock Button
The lock icon toggles note editing:
- Unlocked (🔓): Notes can be moved, resized, and edited
- Locked (🔒): Notes are view-only; prevents accidental changes
This is useful when:
- Presenting a composition
- Exploring without making changes
- Preventing accidental modifications to a finished piece
Footer Links
At the bottom of the menu:
| Link | Destination |
|---|---|
| Documentation | Full documentation site (docs.rmt.world) |
| Donate | Support the project (Stripe) |
| License | View the RMT-PNC license |
Keyboard Shortcuts
These shortcuts work anywhere in the app:
| Shortcut | Action |
|---|---|
Ctrl/Cmd + Z | Undo |
Ctrl/Cmd + Y | Redo |
Tips
- Use keyboard shortcuts for undo/redo - it's faster than opening the menu
- Save to file for backup - the current module persists in browser storage across reloads, but saving to a file is more secure if you clear browser data
- Enable tracking for long compositions you want to follow during playback
- Lock when presenting to avoid accidental edits during demonstrations