What is the water drop button on the Epson ME30 printer for?

Hello, thank you for your support to Epson. The red inverted triangle belongs to the maintenance key and has several functions.

Cleaning the print head (red light is off): press and hold the stop button for 3 seconds to clean the print head.

Off-line self-check: first press and hold the stop button, and then turn on the power to realize off-line self-check.

Cancel the print job: press the stop button to cancel the print job.