This can be particularly important to identify if you work in an environment where you’re not the only person editing the file.
To quickly identify kerned or tracked text, you need to visit InDesign’s preferences by hitting Command + K and select the Composition item in the left-side source list. In the Highlight section at the top, tick the Custom Tracking/Kerning checkbox and hit the OK button.
From that point forward, any text that has been tracked text will be highlighted in green, and any kerned text will be highlighted in orange, as you can see in the image above.