How to add Note Region

You can add note region by double-clicking in the timeline. To add notes to it, you need to select the region by clicking it first.

Code Editor Error

.kdp files are serialized project files, not a source code. You can create a new source file by clicking the src/ directory in the Code Editor.
To add a source code to the note track, first open a node graph and add a KASL node to it. In the Inspector, you can specify the path to the source code (e.g. src/example.kasl).

Added Some More Documentation

I’ve added documentation with screenshots of each panels:

• Timeline
• Inspector
• Automation
• Node Graph
• Piano Roll
• Code Editor