Hello, please how could I change the brightness of the screen on my stm32f746g-discovery kit, I need to do this to reduce the power consumption so it is in a standby mode when it's not in use

[Tesla DeLorean]

The LCD back-light control is via pin PK3 (LCD_BL_CTRL) see schematic.

STM32Cube_FW_F7_V1.15.0\Drivers\BSP\STM32746G-Discovery\stm32746g_discovery_lcd.c

See

 BSP_LCD_DisplayOn() and  BSP_LCD_DisplayOff()