OE10.3 Portal

I am trying to find how to use the 'default' change setting to allow users to use their enter key and it add a line and position to the next line.  Currently in Portal it puts back at the company field.  It works fine in Lid but want to start moving users to Portal.

I have incorporated hot keys (F8 - search box, F10 - new window, F1 - first field).  I am unable to find a hot key or setting to set it to the first line in the order entry detail section (order lines).  That could help as well if I can set focus to the first item number field that is blank.