If your icons look scrambled after an update, you forgot to copy the assets folder to the SD card.
If you want the full power of modern Marlin (including Input Shaping to stop those annoying "ghosting" artifacts), you’ll want a build that supports the MKS Robin Nano's color touchscreen. RolfZuckowskiUltras GitHub repository two trees sapphire pro firmware link
For high-speed printing, users often flash Klipper, which requires a secondary device like a Raspberry Pi. If your icons look scrambled after an update,
Depending on whether you want the official factory firmware or a customized version, use these resources: Official Twotrees Firmware : Visit the official Twotrees Firmware Download Page Depending on whether you want the official factory
"Unlock the Full Potential of Your Two Trees Sapphire Pro with the Latest Firmware Update!"
Sometimes the screen works but shows odd characters. The TFT firmware is separate from the mainboard firmware.