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How to use pressure sensitivity and pen and finger differentiation on the CommBox Classic S5

The Classic S5 supports pressure-sensitive writing with the Brush pen in CommBox Whiteboard, and the screen can tell the difference between your stylus and your finger at the same time — no more switching between draw and select modes.

Applies To

CommBox Classic S5 — All models (CommBox Whiteboard updated to latest version)

Step-by-Step Instructions

Step 1: Update the CommBox Whiteboard

  • Open the CommBox Store and install any available Whiteboard updates before continuing.

Step 2: Open the CommBox Whiteboard

  • From the home screen or side menu, tap Whiteboard.

Step 3: Select the Brush pen to use pressure sensitivity

  • Tap the Pen icon in the toolbar.
  • Select the Brush style from the list of pen types.
  • Pick up a CommBox stylus and write or draw on the screen.
  • Press harder for thick, bold strokes — press lightly for thin, delicate lines.

Step 4: Use pen and finger differentiation

  • The screen automatically detects when a CommBox stylus is touching it.
  • While writing with the stylus, use your other hand to tap, select or navigate with your finger.
  • The screen treats the stylus as the drawing tool and the finger as the selection tool simultaneously — no need to switch modes.

Step 5: Write with palm rejection enabled

  • Rest your writing hand naturally on the screen while writing.
  • Built-in palm rejection prevents your palm from creating accidental marks.
  • Palm rejection is enabled by default on new Goanna builds.

💡 Tip: The Brush pen with pressure sensing is especially engaging for Art lessons and handwriting modelling — students can take turns experimenting with different pressure levels for expressive, natural-looking results.

💡 Tip: Pen and finger differentiation means a student can point at something on the whiteboard with their finger while another student writes with the stylus — both actions work at the same time.

Troubleshooting / What to Do If It Doesn't Work

  • Brush pen is not responding to pressure — confirm you are using an official CommBox stylus. Pressure sensing is not supported with third-party styluses.
  • Screen is not differentiating between pen and finger — restart the Whiteboard app. If the issue continues, go to Settings > Applications > Whiteboard, clear the app cache and reopen the Whiteboard.
  • Palm rejection is leaving marks on the screen — go to the Whiteboard Menu > Settings and check that Palm Rejection is enabled. On Goanna, this defaults to on for new installs.
  • If you need help, log a ticket on the Support Portal in Knowledge Base: https://support.commbox.com.au/knowledge/kb-tickets/new

Video Tutorial Refer to the CommBox Training Hub for a video on advanced pen features at www.commbox.com.au/training-hub.