johnh10

If your blog gets so many comments you tend to skim them during moderation, you can sometimes miss ‘manual spam’ or trollish comments. This plugin will highlight keywords you specify so certain remarks grab your attention for further review. It is useful for blogs that get numerous comments and the moderator tends to skim instead of reading each and every one.

Comment Moderation Highlighter

This plugin will highlight keywords you specify on the admin moderation page, making it easier to spot manual spam and/or troll comments.

sigalitam

Just highlight is a WordPress plugin for highlighting text in your posts or pages, and easily create beautiful posts that highlight what really matters to your readers.
How to use? 
* Select the sentence you want to highlight with the cursor. 
* Click the Just Highlight button at the top of the post editor. 
* Save the post. 
* View the post and be amazed from the animation of the highlight as you scroll down the post.
You can also: 
* Choose the text highlight background color. 
* Choose the highlight speed animation (Slow, Normal, Fast, Very Fast). 
* Choose YES / NO to activate or disable the highlight animation.

Just Highlight

Just highlight - Select the text you would like to highlight, click the highlight button and save the post.

Comment Moderation Highlighter vs Just Highlight