yeah they definitely can, but we will still need to assign them to a scope variable in order to expose them to the ng-attributes handlers. I'm assuming you're talking about assigning them in the [`Prometheus` object namespace](https://github.com/prometheus/promdash/blob/master/app/assets/javascripts/controllers.js) or something similar to that. Is this because you want the aspect ratios available in more places (like the iframe controller)? Or separating "configuration" stuff? Wondering what your reasoning is.