I need your help just to make sure I understand right (Sebastian talks a bit fast for a French girl who was abroad about 25 years ago!).
Concerning Module 1 Section 1 the introduction to the history palette...
A snapshot is just a quick picture of what you've done and like right?
And a layer com is the combination of task that has given you that cool result you like, and then you can figure out quickly box your layers have been arranged and mixed together right?
I'm not sure I got it right because for now I don't really see the utility of the layer com thing. I guess it will make more sense when I'll be further in the course.