DFU mode on Arduino Uno and Mega R3 Clone

Development Tools IDE 1.x
1

Hello All,

ATMEGA16U2 is installed in this uno(clone) and mega.(clone)
Entering DFU mode but still in the serial mode.
Is there a way to enter DFU Mode?
I attached a picture.

Thanks a bunch!

KakaoTalk_20170427_171144389.jpg
KakaoTalk_20170427_171144389.jpg960×540 118 KB

KakaoTalk_20170427_171144659.jpg
KakaoTalk_20170427_171144659.jpg960×540 76.5 KB

KakaoTalk_20170427_171144936.jpg
KakaoTalk_20170427_171144936.jpg960×540 71.8 KB

KakaoTalk_20170427_171145288.jpg
KakaoTalk_20170427_171145288.jpg960×540 135 KB