Edits form.json - opened from Project Editor. Full field-by-field schema: form.json.

• Tap the title in the app bar to rename the form.
• + Add Field opens a sheet to configure a new field: type, label, ID, required, an autocomplete key, and type-specific options.
• Tap a field's edit icon to reopen that sheet; delete to remove it.
• Drag to reorder fields - the order here is the fill-out order.
• Save appears whenever there are unsaved changes.
• Form Settings (tune icon) toggles Enable Presets.

The field ID auto-fills from the label the first time you type one; edit the ID directly and it stops auto-following.

Repeating-group sub-fields are configured the same way, in a nested "Child Fields" section - see Repeating Groups. Autocomplete wiring - see Autocomplete Editor. "Enable Presets" - see Presets Editor.