Shift + Enter
Apply a value and keep focus in edit field
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I'm not entirely certain what you are intending to ask. A little more information in the question certainly wouldn't hurt.
Shift+Enter has no direct function in Illustrator's Transform Panel.
At least not in any version I'm running here.
What I do....
The Tab will commit the value and move the the next field in the panel. Then the Shift+Tab moves back to the previous field in the panel.
By repeating this process, it essentially allows one to continually alter a value in a panel field without any need for a "click" anywhere.