Set index in Word?

Question

Microsoft

I want to set a subscript in the sum formula, not in the sum itself, but in the argument, but it is not available

Answer 1

Hot key combinations that will greatly simplify the work in the Formula Editor: superscript -Ctrl + H (from the English word "high"), subscript -Ctrl + L ("low"), both indexes at the same time -Ctrl + J (" joint").
The bottom buttons of the index panel are intended for inserting operators with indexes. A typical example of such an operator is the sign of the sum (Σ).