My samsung galaxy tab 3 is stuck in odin mode how do i fix it?

[AC Question]

it says not to turn off target but it's stuck on that screen

 

[TheRoundCross]

It doesn't exist an "Odin mode". Maybe you wanna say "download mode" with can be used to flash new firmwares on devices currently on download mode.
So, if (and only if) you aren't trying to flash a new firmware but you were befallen into Download Mode for a mistake, just hold the power button for about 10 seconds and it will restart normally.