Click on your profile image up to the right
Click on Settings
Click on Branding in the menu to the left
When you have navigated to Branding in Settings, you will see an upload area that you can either click on or drag and drop your logo file into.
We recommend using a high-resolution picture that is clipped, masked, or transparent, with no background.
The recipients will see the logo in the email and up in the left corner when they open the document.