Use YARR to read text you have selected using the rapid serial visual presentation method. Open YARR using the menu item on the selection context menu. Click on the YARR popup or press space to start or stop reading. Press up and down to change the reading rate and left and right to change the character limit. Click the close button or press escape to exit. Additional settings are accessible from the add on manager. You can change the default reading rate, the default character limit, the method used to calculate how long words are shown and the background and text colours.