The tutorial navigation is used to navigate between the different steps of an interactive tutorial. The individual steps are layouts, created in the project that are visited in the order of their creation. If the current layout/step is the first one, the previous button will recompile and therefore reset the project.

• tutorial on creating interactive tutorials

a customizable toolbar that can be used to create shortcuts for your GroIMP experience.

see: here

The Node toolbars, can be used to interact directly with a selected Node, they are separated in 2D and 3D: The 3D toolbar is more useful in combination with the 3D view and the 2D one in combination with the 2D Graph.

The 2d Node toolbar

see: here