There are all kinds of methods in which you can provide visual feedback to users. You can use FileMaker's containers fields, calculation fields, and even normal text fields.
There is, however, a great way to provide the visual feedback you desire by using FileMaker's Button Bar object. You gain a lot of flexibility with this method because it's so easy to copy and paste once you've put it into your solution. By using multiple segments in the button bar, and some creative use of hiding and conditional formatting, you can achieve all kinds of cool visual indications of whatever you might want to showcase.
In this video, I walk through the process of adding some up/down arrows and show you how to take advantage of FileMaker's unique tool set in order to accomplish this useful technique.
Click the title or link to this article to view the video.