What is going on when the font of the webpage suddenly becomes smaller?

Yesterday I was attending a building robbing activity. Suddenly the font on the webpage became very small. I couldn't find the input box. I really liked the prize for grabbing the building. For this reason, I could not participate in the building. Now, I can't see where to submit the content. It's really depressed. What is going on? Ok, why is my webpage suddenly becoming too small to be clear?

A: The landlord, I have had the same experience as you. It is estimated that when you grab the building, you constantly copy the content. , while holding down ctrl + mouse wheel caused.

Holding down the ctrl key while the middle wheel of the mouse slides up, the font of the web page will become larger

Conversely, holding down the ctrl key while the middle scroll wheel of the mouse slides down, the font of the web page will become smaller.

It doesn't matter if you don't get the prize, you learned a little trick, huh, huh