Selecting the account, or the budget on a navigation pane, then having the main content showing that account transactions (or budget info), then having a right pane showing details about the transactions selected is easy to work with, doesn't require manipulating many window, and allow to edit multiple transaction easily.
Having each pane be visible or not allow to focus if needed.
Added a Screenshot showing how it worked well all in one window.
Selecting the account, or the budget on a navigation pane, then having the main content showing that account transactions (or budget info), then having a right pane showing details about the transactions selected is easy to work with, doesn't require manipulating many window, and allow to edit multiple transaction easily.
Having each pane be visible or not allow to focus if needed.
Added a Screenshot showing how it worked well all in one window.