It is tiring to memorize and type the words from the Internet to a document or from one window to another. Good thing that there are command keys for Windows and Mac users to make their work easier. Highlight first the text that you will need to copy from the first window. For Windows users, press and hold the CTRL key and while still pressing the CTRL key, hit the letter C.
Go then to the other window, then press and hold the CTRL key now pressing the letter V. For Mac users, press the Command key and C, and paste it using the Command key and V. You can also right click the image, choose Copy and right click and choose Paste on the new window you want to copy an image to.