Asus' integrated clickpad/touchscreen hybrid works well at smaller resolutions or for dragging windows back and forth between the main display. If you don't have an external mouse, however, it might be more trouble than its worth.
https://www.notebookcheck.net/Asus-ScreenPad-2-0-is-so-much-better-than-before-but-it-could-still-use-some-work.495325.0.html