I contribute a set amount to my IRA every month. I want this transaction to show up as an expense in my Spending Breakdown - I want to see that I'm sending money here every month. But at the same time, I don't want this to count as an expense in the "Period Summary" - I want my "Savings Rate" to reflect how much my net worth is growing over time and I want to track that savings rate on a monthly basis.
I could mark the category as "exclude from totals", but then it won't show up in my Spending Breakdown. And if I don't mark it as "exclude from totals", it shows up in the spending breakdown as I'd like but it's counted as an expense for the savings rate calculation.
One possible solution is the ability to mark the category as "savings" - these categories would show up like an expense in the spending breakdown but not count as an expense (or be tallied separately somehow) in the period summary. There might be other similar solutions that achieve roughly the same thing.