Google Play Books become more comic-friendly last year with addition of vertical scrolling. At this year's Comic-Con, Google is announcing another handy feature that will be reading the illustrated panels even easier. The tool is called Bubble Zoom and as you might expect, it detects and zooms in on those speech bubbles as you read. Before now, you had to use two fingers to zoom like you would in other apps. When reading graphics-heavy comic panels, that isn't an ideal solution. Thanks to the new tool, you can enlarge the text with a tap while still gazing at a full-screen view of the page.