Computer screen lighting?

okay so on the screen thing I presed the button to make the screen light go down,
well I turned it to where it's kind of dark,
and now, I want it back normal, and I tried to click it back up,
but it says that this dark is the highest it can go.
how...

do I get it bright again?

it kind of depends on the type of monitor. on most there is a factory reset button, That will restore the default settings, Thats something to try. I don't know why it wont go back up.

for increase the brightness of the monitor . increase the monitor brightness from the
computer as

right click on the desktop. select the graphics properties.

click display settings and click settings , set the brightness of the computer windows.