PC Users - 5 easy ways
1. Full-Screen Screenshot: Press the print screen button (PrtSc, PrtScn or PrtScrn) on your keyboard to copy the entire screen to your clipboard. Paste the image into a program such as Word or Paint or into an email.
2. One-Window Screenshot: Click the window you want to copy. Press Alt + PrtSc to copy the window to your clipboard. Paste as desired.
3. Windows Snipping Tool: Go to the Start menu and find the Snipping Tool. Choose a snip shape. Use the cursor to place and adjust the snip border. The snip will open in a new window to be marked, emailed, copied & pasted or saved.
4. Windows Screenshot: Within Windows, click on the Screenshot command under the Insert tab. Choose from the available windows displayed or click "Screen Clipping" to select part of the active window using your cursor. Use the Crop command under the Format tab if desired.
5. Simple Copy & Paste: Use your cursor to highlight text or an image you want to copy. Right click to choose Copy or press Ctrl + C. Use Ctrl + V to paste into a program or email.
How-to Videos for PC
Screenshots, screen clipping, resizing and repositioning images using Microsoft Word by Robert McMillen (01:37)
Windows Snipping Tool, marking/highlighting images by Robert McMillen (02:30)
Print Screen (PrtScn) button and cropping images; Windows Snipping Tool by Heather Corriere (04:13)
Mac Users - 5 easy ways
1. Full-Screen Screenshot - Press Command + Shift + 3 to copy the entire screen. Find the screenshot on your desktop (labeled "Screen Shot" with date and time or picture #). Attach the file to an email, upload it or drag it into a program.
2. Screenshot an Open Window - Press Command + Shift + 4, then the space bar. Your cursor will appear as a small camera. Move the camera to the window you want to copy. Click on the window. The screenshot will be saved to your desktop.
3. Screenshot Part of a Screen - Press Command + Shift + 4. Click and drag your cursor to highlight the area to be copied. Release the mouse button to take the shot. The screenshot will be saved to your desktop.
4. Save a Screenshot to the Clipboard - Press Command + Control + Shift + 3 to save a screenshot to your clipboard. To save a portion of a screenshot to the clipboard, press Command + Control + Shift + 4. In either case, use Command + V or Edit > Paste to paste the image into a program.
5. Grab Utility - Go to Applications > Utilities > Grab to open the application. Click the Capture menu and choose an option (Selection, Window, Screen or Timed). When the new window opens, save.
How-to Videos for Mac
Screenshots, screen clipping by Howcast (01:10)
Screenshots, clipping and Quicktime video captures by Tech Talk America (03:42)
Screenshots, advanced clipping, copying & pasting; iPhone screenshot by Griffin Hammond (02:29)