In this case, I believe the capitalization is a hold-over from raylib's c library, Odin doesn't appear to put any preference? In Go it has a specific meaning:

In this case, I believe the capitalization is a hold-over from raylib's c library, Odin doesn't appear to put any preference? In Go it has a specific meaning: starting an identifier with a capital causes it to be exported for use in other packages. Identifiers with a starting lowercase char are package private. Apologies if this is explaining what you already know...