Sorry Stephen, we don't have a user interface in the product for what you have requested.
However, we have a configuration file that drives some configurable parameters that control the product and the output video produced.
In the installation folder of Presenter Video Express 11, you will find a file named cplc.ini.
Please do back up this file first and then make the following edits using any text editor (like notepad.exe)
You can do similar changes to LOWER_THIRD_TITLE_FONT_NAME or TITLE_TEXT_FONT_NAME parameters as well. It is important to note here that these are not externalized and they are always "burned in" to the video as pixels.
Also note that you would have to start Presenter Video Express and republish your project after making these changes, and that this would affect all projects henceforth.
Thanks & regards
PS: If this answers your question, please mark it as correct so that it will help other users discover the solution easily.