An item form shows whatever fields its item group defines. Adding a field to the group adds it to every item in that group at once.
Add the field
- Open your project and pick the item group.
- Open its field settings and click Add field.
- Give the field a label, choose its type, and Save.
Existing items keep their values and gain the new field, empty.
Before you pick a type
Changing a type later does not carry the values across, so it is worth a moment now. If the values come from a fixed set, a category, a finish family, use List rather than Text, so they can be filtered later.
What to reuse
Troubleshooting
The new field is empty on every item
That is expected. A new field starts empty everywhere; fill it as you edit each item, or ask an integrator to bulk-fill it through the API.
I cannot delete a field
You can, but deleting a field deletes its values on every item in the group, and that is not undoable. Export first if the values matter.