Editor Camera Perspective

Hello, I was wondering where I could find the options for the editor camera. Somehow, the settings have changed and there is no longer any depth in my editor screen, meaning that things do not get smaller as they move farther away, how can I fix this? Thank You.

Big colorfull gizmo on the top right corner of your scene view. Click on the box on the very center of it, and things will go back to having perspective.