The navigator should only show the canvas screen that is currently being drawn.
I must have clicked something wrong so the blank screen takes up too much of the navigator.
And even if you increase or decrease the red square, only the size of the square changes.
The screen continues to have too much blank space.

You can see the entire vertically long canvas and the blank screen.
Detailed work is not being done at all.
It's so uncomfortable to draw
What should I do?

For reference, I tried resetting the navigator, but it didn't work.
The screen is still like that.