When cranking, the engine may require more or less fuel to get started correctly. The ‘cranking RPM window’ can also be set such that this fuel modification is only carried out during a set RPM range. Typically 50-400 RPM. Once the the engine RPM goes above this upper cranking RPM, the After-Start Enrichment Algorithm becomes active. The driver for these settings is Startup>Startup Settings.


Under cranking, we need only be concerned with the Start up Settings box, and the Cranking Fuel Trim table, which takes the current PW (derived from the VE table and other corrections) and multiplies it by this tables output which is looked up based on engine temperature. 


Similarly to warm up/environmental trimming, we see that once the engine is warm (in this case in the image below 60*C) we no longer add extra fuel when cranking (the table is set to 1.00) as the engine will usually start purely from the fuel requirement derived from the VE table.


As a guide, if the engine requires throttle to start (i.e, you're letting more air in) then the cranking enrichment multiplier is too high.