Hi again,
Regretfully this isn’t a feature offered by X. It could be possible with custom development, but this would be outside the scope of support we can offer. You can use the Topbar instead to display the image In Topbar Content you can add the following code:
<a href="http://rainbowrosescholarship.org"><img width="85" height="85" src="https://rainbowrosescholarship.org/wp-content/uploads/2018/04/rainbowrose-1.png" class="image wp-image-381 attachment-full size-full" alt="" style="max-width: 100%; height: auto;"></a>
Thanks for understanding. Take care!