While ThingLink will pre-populate an icon for you in 360 tagging, you can add any image file you like to stand in as the icon. Use this to add your company branding, indicate the type of content, or show a sneak peak of the tag.
After uploading your 360 image, click the plus button to create a new tag. Add content to your tag.
When your tag is ready to go, click the circle above the tag types in the left panel. If you have an image tag, this circle will be populated by that image. For other tag types, the circle will have a plus symbol. You will then be able to choose any image from your computer to use as an icon.
For a clean look, try adding a PNG image with a transparent background. Check it out below: