Question: Key strokes for entering a subscripted name

What is the key stroke for entering a subscripted name in 2D Math, Documentation Mode? For example, I'd like to enter VBE as a name of a variable.  In the expression palette, I see an and a*.  I know entering an is a_n. But now how do I enter a* ? What is the key stroke in place of the question mark, a?*.  The Maple I am using is version 11. Thanks for the help.

Chin Li

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