I guess you’re using the recovery mode to reset the device and you want to exit that screen. Simply use the volume up & down keys to navigate to “reboot phone” and press the power button once to select it.
Here is the complete steps to factory reset and exit recovery mode.
# If your phone is on, '''power it off'''.
# Hold down the '''Power and Volume up buttons''' simultaneously. You should see the Samsung logo followed by an "Installing system update" screen.
# After a few seconds, you should see a "No command" message flashing on the screen. Wait 10 to 15 seconds at this screen and the device will enter recovery mode.
# Use the '''Volume buttons''' to scroll through the menu and the power button to make a selection.
# Highlight '''Wipe data/factory reset'''.
# Press the '''Power button''' to select.
# Highlight and select '''Yes''' to confirm the reset.
# Once the reset is complete, you will be bounced back to the same recovery mode menu. Press the '''Power button''' to select '''Reboot system now'''.