Nope. My only available option in the Design environment, under "Document Settings," is Units. None of the drawing annotation options, such as font size, as shown in your roadmap screenshot, are visible under "Document Settings" or anywhere else in the program (Drawing environment, Preferences, etc.). Within the Drawing environment the option to edit the title block only permits editing of content, not format). A default font can be chosen under Preferences, but not the font size.
Something has gotten lost in the shuffle.