[android-components](../../../index.md) / [mozilla.components.concept.menu](../../index.md) / [MenuButton](../index.md) / [Observer](index.md) / [onShow](./on-show.md)

# onShow

`open fun onShow(): `[`Unit`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) [(source)](https://github.com/mozilla-mobile/android-components/blob/master/components/concept/menu/src/main/java/mozilla/components/concept/menu/MenuButton.kt#L40)

Listener called when the menu is shown.

