This tutorial will show you how to setup your HTML email signature in Gmail.
Step 1:
Download the HTML file that was sent to you via email.
Step 2:
Open the HTML file in your Web Browser by double clicking it or dragging it to your browser.
Step 3:
Once the Email Signature is open in your web browser, press CTRL + A (Command + A for Mac) to highlight the signature, then press CTRL + C (Command + C for Mac) to copy the signature.

Important: Do not use your mouse to select the area, only use Ctrl + A (or Command + A) as you may miss out on grabbing some of the code.
Step 4:
Login to your Schuitema account via http://www.gmail.com
Step 5:
Once logged in, navigate to the Cog Icon (Settings) in Gmail and select the ‘Settings’ heading from the list.

Step 6:
Make sure you’re in the General Tab, then scroll down to ‘Signature’. Click inside the Text Box, and Paste your Email Signature (CTRL + V or Command + V for Mac).

Step 7:
Your copied Email Signature will appear and is ready to be saved.

Step 8:
Scroll to the bottom of the page, click ‘Save Changes’ and you’re done!

Congratulations! You will now see your brand spanking new email Signature when sending emails with Gmail.