Let's say I have a layer with buildings which is only shown when the scale is higher than 1:10000. When the scale is higher than 5000, I want them to show its function color (retail, residential, ...) and otherwise remain grey. I found the option to do that in Layer-Properties > Style > rule-based, either by typing in the scale in the Min. scale column or by multiselecting the attributes and then clicking Refine current rules where I can enter a scale value.
Is there no other possibility to change the scale or appearance of the selected lines than going through them one-by-one?