Sorry for the misunderstanding about the dialog window but I had pressed <ctrl>k rather than <alt>k. That's why there were a misunderstanding about this window. My error!

Be sure that before asking a question in this forum, I clicked on all help buttons crossing my path. loll

I do understand what can be done through this window. My question is on the 3rd item of the left column: "Highlight text". After setting it to different colors, I am unable to identify the type of text it affects.

Then, what I would like to know is as follow. If I set this parameter to "RED", what text will appear in Red?