The EditText widget by default is single line. In order to allow mutiple lines modify and customize the widget definition in the layout file as below:

    android:singleLine="false" <!-- The Default Value is true, change to false -->
    android:lines="8" <!-- The Height of Widget in terms of total Lines  -->
    android:minLines="6" <!-- Minimum number of lines -->
    android:maxLines="10" <!-- Maximum Lines of lines -->
    android:scrollbars="vertical" <!-- Vertical Scroll Bar to visible for easy scrolling -->
    android:gravity="top|left" <!-- Cursor Position in the widget-->
    android:layout_height="wrap_content" <!-- Either Fixed DP or based on the Content Text -->
    android:layout_width="fill_parent" <!--  Either Fixed DP or Span accross parent width -->