title: React Navigation - opening a modal from the tab bar
body: <p>Using React Navigation (6), I've got bottom tabs set up as my main navigator:</p>
  <pre><code>
  export function TabNavigator() {
    const getColor = ({ focused, color }) =&gt; (focused ? palette.blue : color)
  
    return (
      &lt;Tab.Navigator screenOptions={{ headerShown: false }}&gt;
        &lt;Tab.Screen
          name=&quot;home&quot;
          component={HomeScreen}
          options={{
            tabBarLabel: &quot;Home&quot;,
            tabBarIcon: ({ size, ...rest }) =&gt; (
              &lt;Ionicons name=&quot;home-outline&quot; color={getColor(rest)} size={size} /&gt;
            ),
          }}
        /&gt;
        &lt;Tab.Screen
          name=&quot;favourites&quot;
          component={FavouritesScreen}
          options={{
            tabBarLabel: &quot;Favourites&quot;,
            tabBarIcon: ({ size, ...rest }) =&gt; (
              &lt;Ionicons name=&quot;heart-outline&quot; color={getColor(rest)} size={size} /&gt;
            ),
          }}
        /&gt;
        &lt;Tab.Screen
          name=&quot;about&quot;
          component={AboutYouScreen}
          options={{
            tabBarLabel: &quot;About you&quot;,
            tabBarIcon: ({ size, ...rest }) =&gt; (
              &lt;Ionicons name=&quot;person-outline&quot; color={getColor(rest)} size={size} /&gt;
            ),
          }}
        /&gt;
  
         &lt;Tab.Screen
          name=&quot;bottomchat&quot;
          component={ChatNavigator}
          options={{
            tabBarLabel: &quot;Check-in&quot;,
            tabBarIcon: ({ size, ...rest }) =&gt; (
              &lt;Ionicons name=&quot;chatbubble-ellipses-outline&quot; color={getColor(rest)} size={size} /&gt;
            ),
          }}
        /&gt;
      &lt;/Tab.Navigator&gt;
    )
  }
  </code></pre>
  <p>With the last tab (the <code>ChatNavigator</code>), I want the screen it opens to be a full screen modal, hiding the bottom tab bar (the user can exit out if it via a back button at the top).</p>
  <p>Is this possible?</p>