I know what you mean by "Mobile screenshot" a feature that we can use it easily to take screenshot without all of that GUIs. But there is another way for you to have screenshot mode. I usually use "Hackers' keyboard"(only available at Android as far as I know) in which you can press the nonexistent F9 button to switch to screenshot mode provided by the app.

Yep it would be helpful bt a guy did he is android user

No need for those w/ keyboards set the controls to a desired button. Otherwise, yes!

definitely

Yea we need it

yes
what device are you using?

101% agree

I agreee soo much

100% Agree

shame i can't vote.

'ery noicé idea.