I dont know if this is relevent...
...But you can make it easier to take a screenshot by going in system prefrences, clicking on keyboard & mouse, keyboard shortcuts and then setting the different screen capture elements to the F buttons!
Example:
on my mac
F1=capture screen to file
F2=capture screen to clipboard
F3=capture selection to file
F4=capture selection to clipboard
Not really something thats required but hey its kinda cool and makes there actually be a reason for the F buttons beyond exposé...
😀 😛 😉