As we know, Marlin firmware supports 3 methods of leveling, just config according origin Marlin, MKS H43 can work with all of them automatically.

Manual leveling configuration

If you don't enable any leveling method on Marlin firmware, the default method is manual leveling, the default leveling point is 5. On H43, you can click "Configuration" → "Manual leveling configuration" on the screen to perform leveling Point location configuration.

Grid leveling configuration

You should enable Grid leveling on the Configration.h of Marlin firmware:

#define MESH_BED_LEVELING

On H43, click "Tools" → "Mesh Leveling" on the screen to enter the grid leveling wizard, after leveling, you need to click "Configuration" → " EEPROM"→"Save Settings" to save the leveling data (Note: the Marlin firmware also needs to enable EEPROM).

Automatic leveling configuration

You should enable linear automatic leveling on the Configration.h of Marlin firmware:

#define AUTO_BED_LEVELING_BILINEAR

On H43, click "Tools"→Automatic leveling" on the screen to enter the automatic leveling. After leveling, you need to click "Configuration"→ "EEPROM" to save the leveling data (Note: the Marlin firmware needs to turn on the EEPROM, and the automatic leveling also needs to enable the leveling pin, leveling range, leveling parameters, etc., for details, please refer to the tutorial video in the following link: https://www.youtube.com/watch?v=r2A0b7XQEaI&t=425s