Change it, see what it does, then sign it. Every change is staged, reviewed with its financial effect, and applied as one set.
Pressing Apply on an operation writes nothing.
It stages the change into Studio. Stage as many as the job needs: a rate change and a revised instalment plan on an account, a new bank account and an address on the counterparty, five facilities on a customer. Each shows its full before-and-after on the Staged Changes panel. Then save the set, or submit it for approval where a rule says a second person must sign.
The forecast includes what you have staged.
Stage a deposit of 100,000 on an account holding nothing and the forecast's starting balance reads 100,000, while the plain forecast beside it still reads zero, because nothing is committed. Stage a rate change and the projected accruals move. That is how a change is shaped and checked before anyone signs it, and the approver sees the same projected effect.
Every staged card carries the prior value and the new one. A corrected tax residency shows the old country beside the new.
A change dated next month sits pending on the panel and takes effect when the day walk reaches it. Until then it can be cancelled or re-dated.
A set that crosses accounts, counterparties and settings is reviewed and signed once, as the combined change it is.
Approval rules, rate cards and the other settings screens keep your edits in a staged copy. Nothing reaches the live rules until you publish it, and publishing is an action your organisation can put behind a second signature. There is no way to edit a live rule in one step.
What this means for you: a clerk can prepare a whole restructuring, see exactly what it will do to the book, and hand it to an approver as one thing. The approver signs what will run, not a description of it.