Currently in ImageGear for C & C++, the annotation editor window and the annotation text itself are treated as two separate entities. A text annotation that is being edited is represented by a focused edit window which overlaps the actual text annotation. ImageGear currently does not support the instantaneous update of existing and running edit controls driven by changes in underlying marks. As a consequence, the function 'IG_ARTX_text_font_set' only sets a new FontSize after exiting editing mode.
As a user, I would like to see the FontSize be refreshed immediately while still in editing mode.