I also figured out the frequency is the same and the Square wave was around about 2x the height of the sine.. (You said already the amplifier settings are different)
I assume the numbers across the top of the screen are significant to frequency and voltage but as I have never seen a scope that had those.. They are meaningless to me.
IF I had ever used that scope... the meaning would be remembered.
I do recall in Electronics class (AC) we built a small oscillator and then added modulation.. I thought the scope trace looked,,,, funny.. So I swapped a couple of leads and proved it... Then trouble shot the circuit to find what was wrong and fixed it.. Impressed the heck out of my lab partner.. Teacher (A fellow ham) Knew exactly what I did (Went from a time based display to a trapezoid display which is audio cycle based instead of time). He was somewhat more impressed with my ability to trouble shoot though.
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