How do I remove the rectangle?

ar
9

I need urgent help because my little sister has somehow pressed somewhere on the buttons of my laptop and any such button has the screen indicating what yes, it has somehow made a rectangle so we have to look silly now so we can do something on it

Ca

Ctrl + Shift + Arrow

ar

Thank you but… Which arrow key? Or any?

Ca

Either press the left or right.

ar

Did not work… "oh man I hate her"…

Ca

Then arrow up or down.

ar

Do not think so. But thanks

Ca

Then it was "Ctrl + Alt + Arrow". I'm on my way, so I can't look at my keyboard.

ar

Thank you, you're the best after this message, I'll go to my sister now and make ouch now

Ca

With pleasure.

Are you from the former USSR?