every smart phone I used has an option to take screenshot with some buttons on the phone without touching the screen. I did not find such option in BV6000, haven't seen any info mention it either.
because when you slide that 3 fingers across the screen to take screenshot, most time it will touch the screen and more the page that I wish to take screenshot from. I need it to stay still and use some button(s) to take the screenshot without having to touch the screen please!

if there is such function, please let me know.

you should press the power and lower-volume at the same time, and the press time should not be too short.