Android Studio Changing Shape of The Back Button : [Screenshot of App][1]


  [1]: https://i.stack.imgur.com/0p6ah.png

The back button on the action bar of my app seems a little large.  When I hold my finger on it on my phone the button highlights and I can see the right side of it is rounded out pushing over the text.

How can I make the button square and move the text closer to the left side of the action bar instead of being more out to the middle?
