Hi everyone, I have some good news from the Snagit team. You can still access all fonts on your system. You just can't do it the default way that's been exposed since Snagit 9 via the mini toolbar and advent of the Microsoft Ribbon implementation.
Here's how to do it:
1. Make a callout or text box.
2. Enter some text.
3. Right-click the callout (not the text you just created in the callout. You don't want the floating mini toolbar. You want the context menu for the actual callout/text box.)
4. Click Edit Text. You will be taken to the older interface where all fonts will be available.
Tip: Once you get the font how you like, save the callout or text box as a QuickStyle so you can save some steps in the future.