The font option is: default_font. For example, if you want to set it to imitate the Song Dynasty, write "simfang" in the "Value" column, then save the changes to your startup directory and restart.

The font size option is: fonts_size, and the system provides three styles to choose from.

Menu font option is menu_font, and the setting method is the same as above.

The font options of the model tree are: model_tree_font. The setting method is the same as above.