Subtitle font and size

I use the option in MCEBuddy of PreConversionCommercialRemover=true to burn subtitles to the MP4 file BEFORE commercial are removed in order to avoid out of sync subtitles, and it works.

Does anyone know if I am able to change the font, size or location of the text that is being burned in? Currently it seems to use perhaps an Arial font from my PC, and uses a fairly large text that is centered. Is there a way to change the font to a specific font, as well as use a specific sized font, and perhaps left justify the captioning rather than center?

Anyone know? Is this possible?