Changes at break points

Please help!! I am making changes at tablet, mobile l and mobile P. And they are affecting the desktop layout. This should happen right? For example I present an image on desktop. On mobile it is too big so I reduce it only to go back to desktop and find it reduced. Also ‘buttons’ same affect there.
Can someone put me out of my misery?

Hey Orrin,

You might need to show a video of exactly what you’re doing and share your readonly designer link with a specific example, so the community can help you.