The manual says to look in Hardware Options (the little option cog on the mobile neuro editor). Then turn on Preset Extension Mode.
If you use press-and-hold to advance the programs, it will go *--- , -*--, --*-, ---*, then -***, *-**, **-*, ***-.
If you use press-and-hold to advance the programs, it will go *--- , -*--, --*-, ---*, then -***, *-**, **-*, ***-.