Tap and hold an item until a menu appears (if available), and you may tap to select an action from the menu. In the Tech Specs page, you can find information on touchscreen/stylus support in the Display specification column ④.After entering the product page, click on ③.(The following steps use the model CX3400 as an example)
If you are unsure about your Chromebook's product model, please refer to this article: How to check the model’s name. If you're uncertain about whether your Chromebook supports touchscreen functionality, you can verify this by checking the product specifications on the ASUS official website. Refer to the following illustrations when using hand gestures on your touch screen panel. Gestures allow you to launch programs and access the settings of your Chromebook.
Learning how to use your Chromebook touchscreen