Honestly, I just use paint. Prt scrn, go to paint, press ctrl + V, lasso your selection and ctrl + c. Open a new picture and press ctrl + V. Walla, you now only have what you wanted.
That guy named Poppo You know, the leader of Fyre.
i think the easyest way is to use paint. quick and simple in game or when you want your pic press ctrl+ prt screen then go to paint and do crtl+v
hope this helps
mageer