Grouping Yeelight bulbs

I can use the app perfect to control each bulb, but how do i make a group so i can dim them all at the same time and or change them all at the same time. It is a little bit anoying to change every bulb seperatley in the same room.

If you are using Yeelight app, it’s pretty straightforward, you can either create a room or create a group.

So what do i need to control all lights at the same time? i can create a room yes, there are all bulbs controlled seperatly. There is no option to create and control a group of lights. Maybe i am using the wrong app?

ok works, i had the wrong app. i was using MiHome app