1. To select a business window in UFIDA financial software, you need to double-click each menu in the order of financial accounting → general ledger → voucher → cashier's signature.

2. In the cashier's signature dialog box that pops up, select the voucher date and click OK to set the cashier's signature.

3. In order to restore the cashier's signature, you can double-click any voucher to open it, such as the voucher numbered Fu -0002.

4. In this way, just click the "Cancel" button in the toolbar in the cashier's signature interface.