To change how much of an item you have, do any of these:
- On the Kitchen tab, tap the bar under the item.
- Touch and hold the item and choose Amounts.
- Open the item and tap Change Amounts.
Set Current to what you have now, then tap the checkmark (or Done). For a Have It or Not item, tapping the bar switches it between having it and not; the other ways show an In Pantry switch.
No bar? Make sure Keep Count of What I Have is on in Settings → Keeping Count, and that the item isn’t set to Don’t Keep Count.