+*Most of the settings can be partially updated through merge old values with new values, except settings value of which is list or is not keyword.*
+
+Example of setting without keyword in value:
+```elixir
+config :tesla, :adapter, Tesla.Adapter.Hackney
+```
+
+List of settings which support only full update by key:
+```elixir
+@full_key_update [
+ {:pleroma, :ecto_repos},
+ {:quack, :meta},
+ {:mime, :types},
+ {:cors_plug, [:max_age, :methods, :expose, :headers]},
+ {:auto_linker, :opts},
+ {:swarm, :node_blacklist},
+ {:logger, :backends}
+ ]
+```
+
+List of settings which support only full update by subkey:
+```elixir
+@full_subkey_update [
+ {:pleroma, :assets, :mascots},
+ {:pleroma, :emoji, :groups},
+ {:pleroma, :workers, :retries},
+ {:pleroma, :mrf_subchain, :match_actor},
+ {:pleroma, :mrf_keyword, :replace}
+ ]
+```
+
+*Settings without explicit key must be sended in separate config object params.*
+```elixir
+config :quack,
+ level: :debug,
+ meta: [:all],
+ ...
+```
+```json
+{
+ "configs": [
+ {"group": ":quack", "key": ":level", "value": ":debug"},
+ {"group": ":quack", "key": ":meta", "value": [":all"]},
+ ...
+ ]
+}
+```