It's good to have 'edit after screen capture' on in Display so you can wipe over private info, or circle and point to something on the screen shot with a top edit bar before ticking to save the screenshot. Mine save automatically to a 'screenshot' folder in Gallery, which is handy.
Like above I find power + home together is easiest.
'Android Central' app doesn't have the facility.
'AC Forums' app is an AC only version of Tapatalk / Tapatalk Pro which I found others used to upload.
What drives me completely bonkers is not knowing what I am doing to have my shots appear on the website in differing SIZes. I tried putting the cursor at the end of text, or further down. It drives me Madd!
Sent from my SM-N9005 using Tapatalk Pro