For example: I got "Colors" filter and I want to see items which are blue and red, now I can not do that, I can only select one color, that would be a great feature to let customers select f.e. multiple colors and see like all blue and red items at once.
Thanks for pointing this out! Solid thinking and I fully agree, this is a necessary improvement.
We're actually working on implementing *Collections* from Online Store > Navigation, so you'll be able to customize it right inside of Shopify. (Check the provided screenshot)
We'll let you know once the feature is live. 😁
To more sales 💸