Question: How can I see, which type of index I have?

There is a difference between a variable with an index and a variable name with an index in "2D Math"-Mode.

The variables look similar.

Here an example, what I type and what I get.

a (SHIFT + _) 1:=2
a (SHIFT + CTRL _) 2:=3
a (SHIFT + _) 1 * a (SHIFT + _) 2
a (SHIFT + CTRL _) 1 * a (SHIFT + CTRL _) 2
a (SHIFT + _) 1 * a (SHIFT + CTRL _) 2

And this is, what I get.

Is there a way to see in a document, which type of index I have?

I know, I can convert to "1D Math Input". But in a long document this method takes long.

a[1]*`#msub(mi("a"),mn("2"))`;
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