I noticed an obvious minor mistake in an in-press article. It is related to the description of symbols in an equation, but it does not alter the rest of the manuscript in any way (they were used properly in the rest of the manuscript). Also, any attentive reader could note (and fix) it.
Should I contact to the editor or what to do?
EDIT: I also thought in contact directly to the editorial team due to the smallness of the changes.