Alfred Gabidullin

I tried with a card, no difference. I can zoom in but it's not really fixing it, rather having crutches. I should try the monitor on someone else's camera tho. 

Recently, I bought this monitor and when I connected it to my t3i, it has this black bezels all around and the screen portion is small. 

I went through the settings but couldn't find any solution, as well as online. 

Does anyone know how to fix it? 

Thank you in advance!