Answer:
To screenshot: Ctrl + Shift + window switch key, then click and drag your cursor to select the area you'd like to screenshot.
To copy and paste:
Step 1: Select the text you want to copy by pressing and holding your finger down on the touchpad while you swipe your finger across it. This will make a selection box appear on the screen and everything you select will be copied. The text that will be copied will be highlighted in a different color than the rest of the text. This shows exactly what you’re going to dupcliate after you hit the command.If you’re using a mouse, simply click and hold as well. Move the mouse with your finger pressed down as you select the text.
Step 2. After you’ve selected all the text you want to copy, release your finger from the touchpad (or mouse if you’re using one).
The selected text will be highlighted so you know what you’re copying.
Step 3. Press “Ctrl + C” to copy your selected text.
The text you selected is now copied to your clipboard. This means that every time you paste from now on will paste this exact text.
Step 4. Find where you want to splice in your copied text. Touch the touchpad to place your cursor there.
Step 5. Press “Ctrl + V” to paste your text. If you need to paste multiple times, just repeat Step 5 over and over.
Hope this helps:)