2.8 TFT touchscreen sleep mode?

Is there a way to turn the display and backlight(s) off programmatically? I looked at the library and datasheets, etc, but am not seeing a way to do this. Would like to set it to shut the screen and back lights down if nothing has happened for a period of time. I am running it on an Arduino Mega, any advice would be greatly appreciated! TIA.

Dear memyselfandi
The 1.2 version of TFT Shield can’t turn its back light off,because of non-hardware support.
The 2.0 version can turn it off easy,because there is a function within header file,which can achieve this effect.