After starting 3MT reader, you are presented with what is called the library view. This view lists the books you have opened, most recent first. Simply tap on a book to open it and continue reading. To view the book's description, long press on the title. This also allows you to delete the book if desired.
If you wish to open a book on your phone that has not been opened previously, tap the open button on the action bar at the top.
Once a book is opened, the app enters reading mode. The following gestures allow you to navigate within the book. If explore by touch is enabled on your phone, use two fingers with each gesture.
Flick up - previous line
Flick down - next line
Flick left - speak and spell previous word
Flick right - speak and spell next word
The action bar shows the title of the book, and contains a button to return to the library view. In addition, the following buttons are available.
Play - starts reading. Press play again to stop.
Previous - moves to the previous section, if any.
Next - moves to the next section, if any. If the book only has one section (e.g. text files), next/previous will be disabled.
Contents - shows the table of contents for the book. Tap an entry to move to that section.
Below the buttons is a position progress bar. Tap it to adjust the position in the current section, as a percentage.