Split button.
Pairs a default action with a menu of related alternatives.
See it in context
What it is
The main segment executes the common command immediately. A separate arrow segment opens choices such as alternative export formats, making the default action faster to reach.
When to use it
Make the main action and the menu opener separate, clearly labeled targets.
Know the difference
A menu button only opens choices; the main part of a split button acts immediately.
Across platforms
Web
Use a native button for an action and an anchor for navigation. Preserve keyboard activation and a visible focus indicator.
iOS · iPadOS · Android
Provide a comfortable touch target, use familiar system symbols when appropriate, and show a clear pressed or selected state.
macOS · Windows · Linux
Keep pointer, keyboard, and focus behavior consistent. Common commands can additionally expose a menu item or keyboard shortcut.
Go to the source
Primary documentation for the pattern and its platform conventions.