Import the Saturday viewings sheet
Upload the office grid (ViewingsYYYY_MM_DD.xlsx), or a screenshot or phone photo of it (up to 3 if the grid doesn't fit in one). On a computer you can also paste a screenshot straight in with Ctrl+V. It is read, matched against current listings and staff, and shown for checking before anything is booked. Re-importing is safe: slots already booked are skipped.