Place the arrow before the first word of whatever text you want to copy, then depress and hold the left button on your mouse while moving your mouse to the end of the chosen text. You will see the text highlighted as you move the mouse. Once you get to the end of the chosen material, release the left button. The text will remain highlighted. Move the arrow over the highlighted area and press the right button on your mouse. A list will pop up, then move the arrow down the list to highlight the word "Copy". Click on this with your left button and this will then copy the area you had highlighted.
Then, go where you want to insert the info and click on the right button again. Go down the list until "Paste" is highlighted and click on it with the left button on your mouse. You should now see the text you highlighted before, but in the new location.
Cheers