Set Label as Bold

Using Preferences-Favorites and Recent-Labels, I checked Bold in Font Style with no affect. In the past I had marked black as Bold, somehow, and in the label heading. It shows Black-Bold. But when I try to change other labels it does not go Bold. Cannot figure out how to make the label show as Bold.
Bob

Are you sure you have applied the label you just changed to some files/folders?

Okay. This time I started by restarting my computer. I went back into labels and uninstalled and reinstalled the color Label. It appeared I was getting the same results. But then I noticed when I would turn bold on and off in the settings I would get a very slight change in the label. So yes I am getting bold but nowhere near as predominant as black. The bold and other colors was so slight it was almost nonexistent.

Maybe it's the font that I'm using. But I'm not given a choice to change the font, so be it as it may. Thanks again for the help.
Bob

What "bold" means is down to the font.

To change the font: Preferences / Display / Colors and Fonts / [Fonts] File display

It was a lead to many good font possablitis.
Bob