Acer Answers Chromebook

Disable touchscreen functionality on Acer Chromebooks

Sign-in to your Acer Chromebook.
Launch your web browser and type chrome://flags.
Type Debugging keyboard shortcuts in the search box.
Change the setting for Debugging keyboard shortcuts to Enabled.
Click RELAUNCH NOW.
Press the Search + Shift + T keys at the same time to toggle your touchscreen functionality on or off.