How do I disable horizontal scrolling?

I'm working in Numbers and have set a template with a static number of columns (am not adding columns, just entering data) but over and over again I keep inadvertently brushing the mouse and scrolling causing the document to shift left and right, most annoyingly to the left enough to where I can then only see half of my document and have to stop and drag it back to center. It's driving me crazy. I can't find a way to turn off horizontal scrolling in system settings/mouse. Is there maybe a way to freeze the screen in Numbers when you are working with a set template that doesn't need to grow more columns?