I am getting an issue in Indesign CS6 where some text is randomly highlighted in yellow, when no stroke and no highlighter is selected. I am not getting the option to remove the highlights or a reason why certain text is appearing the highlights. What could this issue be and how can I remove the yellow highlights?
It’s not random. Check your preferences for composition.
I bet it's things like Ligatures or small caps. Yellow highlights are substituted glyphs.
Different tints of yellow on entire lines indicate possible composition problems. Everything mentioned in this and the previous posts can be found in the Preferences panel.
It's just an UI indication, by the way. Just like "Show Hidden Characters" - it won't be visible in any ouput, or indeed in Preview mode.