Budget a transfer to an account, such as a mortgage

You can budget transfers in Quicken Windows. Go to the budget and select Manage Budget Categories and then can select "Transfers In" or "Transfers Out" as the case might be for budgeting.

Using Windows, my budget included a line for mortgage interest, which is a category and mortgage account. Mac does not seem to allow me to budget the transfer.

This seems odd as the Mac version generates the split transaction for interest and principal but it does not let me budget the principal portion.

Am I missing something? I do some weird stuff to make up for it and wonder what others do for their mortgage payment.

I love the new stuff added and am thinking this must be coming but haven't seen anything about it.