Currently there is a really nice way to enter all kinds of different intervals for expenses and income. However, to have better control and overview of them it would be great to have an option to display other intervals while you are looking at a different interval.
You have yearly expenses for insurance. Each month you might have other insurance payments.
It would be great when you are in the monthly view to have a 12th of the yearly expense to show up ghosted in the category of the same name or have a new category that you can't edit in the monthly view with a hint (tooltip) to edit this category in the year view.
This would help planning expenses a lot.
I hope my explanation is clear enough.