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 # `bitcoin.conf` Configuration File
 
 The configuration file is used by `bitcoind`, `bitcoin-qt` and `bitcoin-cli`.
 
 All command-line options (except for `-?`, `-help`, `-version` and `-conf`) may be specified in a configuration file, and all configuration file options (except for `includeconf`) may also be specified on the command line. Command-line options override values set in the configuration file and configuration file options override values set in the GUI.
 
 ## Configuration File Format
 
 The configuration file is a plain text file and consists of `option=value` entries, one per line. Leading and trailing whitespaces are removed.
 
 In contrast to the command-line usage:
 - an option must be specified without leading `-`;
 - a value of the given option is mandatory; e.g., `testnet=1` (for chain selection options), `noconnect=1` (for negated options).
 
 ### Blank lines
 
 Blank lines are allowed and ignored by the parser.
 
 ### Comments
 
 A comment starts with a number sign (`#`) and extends to the end of the line. All comments are ignored by the parser.
 
 Comments may appear in two ways:
 - on their own on an otherwise empty line (_preferable_);
 - after an `option=value` entry.
 
 ### Network specific options
 
 Network specific options can be:
 - placed into sections with headers `[main]` (not `[mainnet]`), `[test]` (not `[testnet]`) or `[regtest]`;
 - prefixed with a chain name; e.g., `regtest.maxmempool=100`.
 
+Network specific options take precedence over non-network specific options.
+If multiple values for the same option are found with the same precedence, the
+first one is generally chosen.
+
+This means that given the following configuration, `regtest.rpcport` is set to `3000`:
+
+```
+regtest=1
+rpcport=2000
+regtest.rpcport=3000
+
+[regtest]
+rpcport=4000
+```
+
 ## Configuration File Path
 
 The configuration file is not automatically created; you can create it using your favorite text editor. By default, the configuration file name is `bitcoin.conf` and it is located in the Bitcoin data directory, but both the Bitcoin data directory and the configuration file path may be changed using the `-datadir` and `-conf` command-line options.
 
 The `includeconf=<file>` option in the `bitcoin.conf` file can be used to include additional configuration files.