Attention: Before proceeding you must have your new email signature copied to your computer's clipboard. To do this, follow these next three steps exactly:
Click the link to your signature that has been provided. Your email signature will open in a browser window.
Do not click or try to highlight anything using your mouse. Using your keyboard only, SELECT ALL by pressing Ctrl-A [Command-A for Mac] (the "Ctrl" key and the "A" key at the same time). Everything will turn a color, blue usually.
Then using the keyboard only again, COPY by pressing Ctrl-C [Command-C for Mac] (the "Ctrl" key and the "C" key at the same time). You won't see anything happen, but your email signature will be copied to your computer's clipboard. Do not use copy-and-paste for anything else until you've reached the step in the following instructions where you paste your signature in place.