Thêm
Here you can add things to your notes.
Nhập
Here you can import existing files inside your documents. Supported are butterfly documents, markdown, png, svg and pdf.
Tools
To add more tools to your toolbar, click on them. Read more about them here.
Surfaces
These are special tools to create surfaces.
Actions
These are tools that will be executed by clicking on them. You can use the play button to execute them without adding them to the toolbar.