Reference Images ...

I cannot figure out how to input a reference image. I found the tab with render images … But it isn’t showing up at all …
Help would be appreciated.

Background Images https://www.blender.org/manual/de/editors/3dview/display/background_images.html

You’ll need to be in the view set in the panel (top, fron etc) and in orthographic view (toggle between orthographic and perspective view with numpad 5)

Are you in orthographic view? You can press Num5 to switch between orthographic and perspective mode, you can use use Num1, Num3 and Num9 to switch between views, holding ctrl while pressing any of them will also give you the opposite view. (for exampleL Num1 puts you in front view, Ctrl+Num1 will put you in back view)

Ah. I was not in orthographic view. Thank you very much. Also thank you to dcbloodhound.