How to make a camera active?

hello,
I want to use the “align active camera to view” but it is disabled. I guess the camera is not set to active? Anyway, when I have more than one camera I can’t find out which one is active, or change that.

Ctrl + numpad 0, you should really need to explore the blender menus , you’ll find a lot of answers there.

Anyway, when I have more than one camera I can’t find out which one is active,
Active camera has a solid triangle
Also look in the Scene settings to see/select name of active camera


Thanks so much to you two! I wrote these notes in a document in case I forget.