Being able to send emails to your prospects and leads is great, but you also need to make sure everything you're used to having in your inbox is also available to you inside noCRM, such as your email signature.
Once you've connected your inbox to your noCRM account, you can proceed to the set up of your signature. This is a user level preference, and can be found in ⚙️ > My Settings and Preferences
Signatures can include an image, and you can choose to display it in different ways.
Here an example: