U could press more than one time...
Or try PChand Screen Capture, it can help u capture anything on the screen. I'm using it and it's easy to use, even for a novice. I think it is pretty good... Hope it could help...
http://www.screen-capture-record.com/
You Press the Print Screen button you fool ;)
The print screen button on your computer takes a still screenshot and pastes it to your clipboard. Whenever you open up any application after hitting your print screen key, you can paste the image of your computer screen.
press the print screen sysrq button above numlock
A screenshot is a picture of your screen. You can get it by pressing the Print Screen button on your keyboard. You can then paste it into a Powerpoint presentation, or into other kinds of documents. Screenshots are handy for showing parts of your computer screen. You can get a screenshot of the whole screen and then crop it to show just the part you actually want in a presentation.
f8 or print screen.
Press the Home button and the phone unlock button at the same time wait for a second and the screenshot will apper in your phone gallery.
A screenshot on a Windows XP computer may be done by pressing the 'Print Screen' button, or on a Windows 7 computer by navigating to Start Menu > Accessories > Snipping Tool in addition to the 'Print Screen' function.
Once you've taken a screenshot using the "Print Screen" key (PrtScn) on your keyboard, you need to paste it into an application, document, or image editor. Here are the general steps to paste the screenshot: Capture the Screenshot: Press the "PrtScn" key to capture the entire screen. Open the Target Application: Open the application or document where you want to paste the screenshot. This could be a word processor, image editor, email client, web browser, or any program that supports image or document editing. Paste the Screenshot: To paste the screenshot, use the standard paste keyboard shortcuts: On Windows: Press "Ctrl + V" to paste. On macOS: Press "Command + V" to paste. By following these steps, you will paste the screenshot you captured into the application or document you have open. You can then further edit or save the screenshot as needed within that application.
Press the button the says "print screen", paste it into paint, save file into pictures.
Press the key that says: PrtScn SysRq Then go into paint and paste it there, then select the parts of the image you want and click copy, then click new and paste, then save!
Print screen or you can download apps like hiper cam
Use "PrntScr" (Print Screen) key on Keyboard.