Chromium Only A Pen is a type of pointer input that has most of the same behavior as a mouse, but can also have event properties unique to a stylus. Additionally, while a mouse has 5 buttons, a pen has 3 equivalent button states: 0 — Touch Contact (the default; equivalent to a left click) 2 — Barrel Button (equivalent to a right click) 5 — Eraser Button (currently unsupported by drivers) Using a Pen Java Python CSharp Ruby JavaScript Kotlin Selenium v4.
