RE: Field Groups under Table
Hi Lhadol,
When creating a form, you can drag a field group to a grid to add all fields in the field group in the grid at once. If you drag a field group to a tab, a group control will be created in the tab containing all fields in the field group.
When you update the field group, say add a new field to the field group at the table, the added fields will appear in the form as well.
There are many examples in AX. One would be the LedgerJournalTable Form. You can go to Designs > Design > Group:Group > Tab:Tab > TabPage: General > Group:Identification.
If you look at the DataGroup property of the group, you'll see "Identification" assigned.
As for your other inquiry, I never encountered that. Normally I would change the field name, then "restore" the form object (so that the datasources are refreshed), then edit the DataField property of the affected controls. So that's an unexpected behavior you got there.
Kind Regards,
Dominic