Tap/Click once to bring up the top menu bar. This contains the most frequently used functions in the reader.
Clicking on the left and right arrows on the sides of the screen will navigate backwards and forwards through the magazine.
Click to toggle through different viewmodes (Auto, Single-page and Double-page, respectively).
Clicking on the fullscreen icon will enter fullscreen mode. Click it again to leave fullscreen mode.
Drag the scoll bar at the bottom of the reader to quickly move through the magazine whilst previewing the pages.