how to change size of navigation view menu items and text?? How to change space between menu?

I am making a sliding menu. I have successfully created a navigation drawer and menu items inside the navigation view in groups. But I want to make the items closer to each other. Can I change the spacing or size of items and text? Please help...

Solution

Create following Theme in your styles.xml for Navigation Drawer and you're done.

<style name="NavigationTheme" parent="AppTheme">
    <item name="android:textSize">16sp</item>
    <item name="android:layout_marginBottom">02dp</item>
</style>

Apply this theme to your navigation drawer layout