Now (ArcGIS Pro 2.6), in the Create Feature Class / Create Table Wizard, it is not possible to edit the alias property of an automatically generated field. If I would like to change the OBJECTID’s field alias from “OBJECTID” to “№”, or the SHAPE field alias from “SHAPE” to “Geometry” I have to create the table / feature class, go to the geodatabase, right-click on the table / fc, Design, Fields, and then rename the alias there. It would be easier to change the alias right in the wizard immediately.
