If you want to turn off touchscreen on chromebook, one way is to use Chrome flags. First, launch the Chrome browser, then type chrome://flags in the address bar and hit Enter. Look for "Debugging keyboard shortcuts" in the list of experiments and switch it on. You will need to restart your Chromebook for the changes to take effect. After that, press the Search key + Shift + T simultaneously, and the touchscreen will be toggled off. With this keyboard shortcut, you can easily turn touch input on or off without having to alter the system settings every time.
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