Hi,
So if I understand correctly you want to directly create an item (e.g. page or custom table item) when inserting them. Without moving away in the editor interface?
Out of the box there is no such thing. However you can create you own control that isn't even that complicated.
See how to create a custom control: docs.kentico.com/.../example-developing-custom-form-controls
and the API examples on how to create custom table items directly from code:
docs.kentico.com/...#Customtabledata-Addingdatarecordstoacustomtable