Solr Cloud configuration

[David Hastings]

I cant seem to find the documentation on how to actually edit the schema
file myself, everything seems to lead me to using an API to add fields and
stop words etc.  this is more or less obnoxious, and the admin api for
adding fields/field types is not exactly functional.  is there a guide or
something to let me know how to do it normally like in standalone solr?