This relates to the email settings for any mail sent on behalf of your workshop account (e.g like sending files from the Share function). 

1. Click on the ‘Settings’ cog wheel icon.  

2. Click 'Workshops'

3. Click 'Email Settings'. Here you can add a disclaimer in the footer or cover image (e.g. your company logo or designs) to the email template header.
You can also preview it as you go, to make sure it looks right! 

Header images go at the top of the email. Perfect dimensions are 500px by 133px.

4. Click ‘Save’ to save any changes made.