Finally, i got flyme 6. each font also has its own characteristics: size, spacing, and so on. By default, the system will display each font at 16px (CSS pixels). This is a good default for most cases, but may need to be adjusted for a specific font - i.e. the default size can be set lower or higher to accommodate for the different properties of the font. Then, once the default size is set, larger and smaller fonts should be defined relative to the default size using font adjustment . These can then be used to adjust size of the text for primary, secondary, and other type of content on the.. there are so many free and paid font.