>Is there a way to highlight text between < PRE > and < /PRE > codes? I tried < B > - without the spaces - but got the codes for bold visible, instead of having the text bolded.
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>Sometimes I want to highlight individual parts of program code, for instance, commands I added.

As Sergey mentioned, no tag is supported inside of PRE. Otherwise, there wouldn't be any logic of knowing what should be a tag and what should be a greater sign for example when putting some code.