squid
I am unable to specify the data type on math channels. The following is all that I see:
 
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My co-worker is able to see the data type on the same config / box with his laptop. We are both on the same version:

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Gummi
This is because on your co-workers laptop the "Show Advanced" has been ticked. This is found in the bottom right hand corner of the math channel menu.
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