In the link above, there are certain things I can't find the settings for that I want to change.
First, you'll notice in my printf statement near the bottom of the open file, the variable that is in the template file i've set up for printf is outlined in red when I start typing. I've looked all over the settings, particularly in (Settings | Editor | Colors and Fonts), and I've been unable to find a setting for this.
You'll also notice red jagged underlines under the file name and the src folder near the top.
Neither of these settings seems readily accessible. Is there a way to change them?