This does have to be done via the Oral-B smartphone application and cannot be done via the toothbrush itself.

The «Count up» timer displays your actual brushing time. The «Count down» timer indicates the remaining The Cross Action, FlossAction, TriZone or Precision Clean brush heads are most suitable for this cleaning mode.Precisely what you see will depend on your specific brush handle, but you will normally see a list of cleaning modes. Timer – You can choose between «2-Minute» or «Professional» timer and «Count up» or «Countdown» timer. At the same time, the bristles, angled at 16 degrees, surround each tooth individually. As such, they offer a focused and precise cleansing. In fact, the rounded-shaped brush head, inspired by dentists, allows a gentle but deep clean. Hence, it leaves you with a professional cleansing feeling every day. As a matter of fact, the brush head has high-density thin filaments that ensure a gentle cleanse and protect the gums. On top of that, it includes a built-in timer that helps you brush your teeth for two minutes as the dentists recommend. As a result, you get a unique brush head that offers a gentle energy of micro-vibrations for synchronized and consistent cleaning. But, Oral-B does offer specialised brush heads, which are designed and suited for particular cleaning modes. Unique Oral-B's 2D cleaning technology: oscillates and rotates for up to 100% more plaque removal vs. a manual brush

The principle is that you spend 45 seconds for each quadrant of the mouth (upper right, upper left, lower right and lower left) compared to the standard 2 minute clean and 30 second intervals. If your brush has a wireless smart guide, you could try this that I have taken from an Ora-B manual. It offers a gentle massage of gums to stimulate blood flow and strengthen and nurture the gum tissue. Like the 2 minute timer, this causes a change in the brushing sensation and the sound of the brush and is the alert you need to change from one quadrant to another.

This hopefully helps explains what each modes means and how exactly the brushing modes differ. Oral-B cleaning modes comparison chart