01-24-2019 04:10 PM
Welcome to the community forums.
It doesn't show that the Lenovo Active Pen 2 is compatible with the Thinkpad X280. If you have the touchscreen variant of this laptop, you can use a capacitive type of pen that will replicate the touch screen feature of your laptop.
01-25-2019 08:23 AM
I cannot answer your question directly. Although I do have an X280, but I do not use the touchscreen feature on mine (I wish I could shut it off completely!).
There is a ThinkPad Option Matrix you can download and open in Excel to find compatible assessories for your model ThinkPad. Unfortunately it does not show any of the Lenovo pens as being compatible. Nevertheless, I suspect that a capacitive-type pen as suggested above would probably work.