You can use text to enter instructions on the chart.

rit. Ritardando
ral. Ralentando

There is also a Fermata (Birdseye) available in the editor.

Info:
Glossary
http://www.irealb.com/forums/showthr...&p=282#post282

The above expressive options are to provide information to musicians and are subject to interpretation.
The player feature currently does not alter playback tempo once started.
)BOB