Period is late - how to adjust the calendar

M.Jane • Married 💍 🏡 TTC baby#1

Hello - i have seen on someone else’s screenshot ( cant remember where) that they too have not started their period when the app said they would but these days are now grey’d out and it says AF 1 day late, 2 days late etc etc

How do i do that? I can only seem to delete the period start day but i want a record of it being late

I hope this makes sense 😬

Thanks