Changing text in the marker icon

Hello Articulate Community,

I'm wanting to make the icon of a set of markers into numbers. So they should be 10, 20, 30, 40, 50, 60, 70, 80, 90. 100. However the standard marker icons only allow numbers 1-20.

Is there a way to change the numbers as above? Perhaps using code? I'd like to avoid a workaround of creating shapes to act as markers. 

Thank you!

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