>I want to change all "Hello World" text in a document to red. Is this possible? Other than doing it one at a time...?

In Word, you press ctrl-h and type "hello world" in the upper combo of the dialog. Then click the replace combo (it has to have focus!) and then click the "more" button - don't need to type anything in the replace combo. Under "more", you'll get the formatting options, select what you want and just go replace. I've got the word "from" in violet all over an old text this way, just to try it out.

Now keep the macro recording while you do this... and then look at the macro, if the idea behind this was to automate the thing.