How to change the font-size of navbar title?

[nammiharika]

Hi, i am using this module it's working fine. How can i change the font-size of navbar title in parallax-scrollview. Please give me any suggestion. Thank you in advance.

Code:-

<ParallaxScrollView
          windowHeight={height * 0.5}
          backgroundSource={{
            uri: imageArray
              ? productDetails.images[0]
              : productDetails.images,
          }}
          navBarTitle={productDetails.product.title}
          navBarTitleColor={Colors.white}
          navBarColor={Colors.black}
          headerView={<View style={{flex: 1}} />}
          leftIcon={{
            name: 'chevron-left',
            color: Colors.white,
            size: 20,
            type: 'font-awesome',
          }}
          leftIconOnPress={() => navigation.pop()}>
          <Scrollview>{this.renderContent()}</Scrollview>
        </ParallaxScrollView>

Versions:-

"react-native": "0.61.4"
"react-native-parallax-scrollview": "^3.0.0"