diff --git a/kitty/cli.py b/kitty/cli.py
index 9cbac5a15..3e990ced1 100644
--- a/kitty/cli.py
+++ b/kitty/cli.py
@@ -117,7 +117,7 @@ def title(x: str) -> str:
 
 @role
 def opt(text: str) -> str:
-    return text
+    return bold(text)
 
 
 @role
diff --git a/kitty/remote_control.py b/kitty/remote_control.py
index 0325e9268..8f78bb869 100644
--- a/kitty/remote_control.py
+++ b/kitty/remote_control.py
@@ -198,10 +198,12 @@ def handle_cmd(boss: BossType, window: Optional[WindowType], cmd: Dict[str, Any]
 
 global_options_spec = partial('''\
 --to
-An address for the kitty instance to control. Corresponds to the address
-given to the kitty instance via the :option:`kitty --listen-on` option. If not specified,
-messages are sent to the controlling terminal for this process, i.e. they
-will only work if this process is run within an existing kitty window.
+An address for the kitty instance to control. Corresponds to the address given
+to the kitty instance via the :option:`kitty --listen-on` option or the
+:opt:`listen_on` setting in :file:`kitty.conf`. If not specified, the
+environment variable :env:`KITTY_LISTEN_ON` is checked. If that is also not
+found, messages are sent to the controlling terminal for this process, i.e.
+they will only work if this process is run within a kitty window.
 
 
 --password
diff --git a/tools/cmd/at/main.go b/tools/cmd/at/main.go
index 5153f27d2..44fcf88eb 100644
--- a/tools/cmd/at/main.go
+++ b/tools/cmd/at/main.go
@@ -17,6 +17,13 @@ func EntryPoint(tool_root *cobra.Command) *cobra.Command {
 	})
 	root.Annotations["options_title"] = "Global options"
 
+	root.PersistentFlags().String("to", "",
+		"An address for the kitty instance to control. Corresponds to the address given"+
+			" to the kitty instance via the :option:`kitty --listen-on` option or the :opt:`listen_on` setting in :file:`kitty.conf`. If not"+
+			" specified, the environment variable :env:`KITTY_LISTEN_ON` is checked. If that"+
+			" is also not found, messages are sent to the controlling terminal for this"+
+			" process, i.e. they will only work if this process is run within a kitty window.")
+
 	root.PersistentFlags().String("password", "",
 		"A password to use when contacting kitty. This will cause kitty to ask the user"+
 			" for permission to perform the specified action, unless the password has been"+