The rule-based vector style applies one symbol per created rule and can apply maximum and minimum scales to toggle symbol visibility. This vector style is best when you want a different symbol that is based on different expressions or when you want to display different symbols for the same layer at different map scales. For example, if you are styling roads, a rule could be set to make roads appear as thin lines when zoomed out, but when zoomed in, the thin lines will disappear and be replaced by thicker lines that are more scale appropriate.
There are no default values for rule-based styling; however, if a style was previously set using a different styling type, the style will be converted into rule-based when this ...
