Android Basic Go Back Changing the Apps Look views 7:36 Now the next step is to change how the app looks. Let us now see how the size of the text can be changed and how the color of the button can be changed. The first thing we will do is to make changes in the appearance of the textview. Open Activity_Main.xml in the text pane. To increase or decrease the size of the text, we will make use of the attribute android:textSize. android:textSize="160sp" Android Operating Systems & Apps Creating First App Designing Your App Views of Apps Changing the Apps Look Making an Interactive App