Currently in test steps or tests if there are annotations or comments on the tests there is nothing to notify either an admin or other users of this.
This can be done by:
a different color, an icon is on the step in the trainer
hovering over it shows the annotation in the trainer
right clicking changes from annotate to read annotation in the trainer
there is a highlight box around it different from any other colors
How bout the new orange or yellow from the mabl logo ?
For tests, when logging in there came be something that says, tests have new comments to be read or something similar. I have attached some mockups for ideas.