How add option of "more" in navigation to bar? - react-native

I have an app that has 6 menu options, so I need a button on the tab navigation to bar that opens as a drop down so I don't have too many buttons on the tab navigation .
It's possible?
I tried to do it with Drawer, but the navigation tab disappears when I open the other pages. Can anyone help?

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Keep Drawer open when navigating in React Navigation 5

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How to center a button on the navigation bar using react-native-router-flux?

I'm using react-native-router-flux for navigation in my app, I've managed to create buttons on the left (hamburger menu) and right on the navigation bar, however I also need a button in the center of the bar, how can I do this ?
Att
I was able to do this by creating a navbar from scratch only. It was not complicated. Thank you router-flux for making this prop

How to handle Custom Events of Tabs on TabNavigator ReactNative?

I am taking a bottom tab navigator which is having five screens. At third screen which is home screen I want to open modal which contain 2 buttons. When user click on home button show modal and hide tab navigator and when user click anywhere at screen it gets out from modal .
I want functionality like this issue on GitHub presented :
https://github.com/react-navigation/react-navigation/issues/1059.
You can handle click on tab using next https://reactnavigation.org/docs/navigators/tab#tabBarOnPress
So in tabBarOnPress you can implement your custom logic ( open modal, trigger redux action, etc... )

How do you add a button to the "navigation bar" in IntelliJ?

By default, in IntelliJ, the main toolbar is hidden. When it is hidden, there are essential buttons that are shown in the navigation bar. I don't need the full toolbar, but it would be nice to be able to add a single button to the navigation bar.
How do you add a button to the navigation bar?
You can customize any menu or toolbar in IDEA in settings by going to:
Settings-> Appearance and Behavior -> Menus and Toolbars
The item you are looking for is called
Navigation Bar Toolbar