I don't use that camera control thing. I use the 3 icons above the scene window (see image).

I tried those controls you have pointed to, but nothing happens.

I'll just work with it at this large size and just move it left and right as I need to.  When it's finished I'll just rescale it to a more usable size.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi