Dev:Source Glossary

State

Any tool in the toolbox, these define Synfig's modes.

States can be transitory ( state_stroke is responsible only for displaying/inputting the stroke as you draw it with another tool) or they can register themselves with the Toolbox and be 'sticky'.

Action

I don't know yet, but there's a lot of them! Snap

Probably everything that can be undone.
?where is an action created / stored / executed?

Events

Synfig has an event system, using GTK's event system, I think. Snap

Here is the gtkmm documentation. Maxy