| magenta | Options.Applicative.Help.Pretty, Options.Applicative.Help |
| many | Options.Applicative |
| manyM | Options.Applicative.Types |
| mapParser | Options.Applicative.Common |
| mappend | Options.Applicative.Builder, Options.Applicative |
| MarkDefault | Options.Applicative.Types |
| maybeReader | Options.Applicative.Builder, Options.Applicative |
| metavar | Options.Applicative.Builder, Options.Applicative |
| missingArgP | Options.Applicative.Internal |
| missingDesc | Options.Applicative.Help.Core, Options.Applicative.Help |
| MissingError | Options.Applicative.Types, Options.Applicative.Internal, Options.Applicative.Builder, Options.Applicative |
| mkCommand | Options.Applicative.Builder.Internal |
| mkCompleter | Options.Applicative.Types, Options.Applicative.Builder.Completer, Options.Applicative |
| mkOption | Options.Applicative.Builder.Internal |
| mkParser | Options.Applicative.Builder.Internal |
| mkProps | Options.Applicative.Builder.Internal |
| Mod | |
| 1 (Type/Class) | Options.Applicative.Builder.Internal, Options.Applicative.Builder, Options.Applicative |
| 2 (Data Constructor) | Options.Applicative.Builder.Internal |
| modCompleter | Options.Applicative.Builder.Internal |
| MonadP | Options.Applicative.Internal |
| multiSuffix | Options.Applicative.Builder, Options.Applicative |
| MultNode | Options.Applicative.Types |
| MultP | Options.Applicative.Types |