On Sunday, Apple developer Steve Troughton-Smith leaked new details about the second-generation Apple Pencil. Likely to be announced tomorrow, Oct. 30, alongside new iPad Pro models, Apple’s next-gen input device for iPad could include a button on the side that performs various tasks.

According to Troughton-Smith, the Apple Pencil 2 will feature a slide gesture that you can use to change the brush size and color on the fly. He explains: “The way I figure, the new Pencil will have a button of some sort on the side that when you hold down you can perform gestures with the Pencil — tap, double tap, or swipe.”

The button is also being described as  “the iPad’s right-click.”

The original Apple Pencil was first announced in September 2015 and arrived two months later. It’s compatible with iPad Pro models along with the 2018 iPad, which was released earlier this year.

At tomorrow’s “There’s more in the Making” event in Brooklyn, New York, Apple’s expected to announce 10- and 12.9-inch iPad Pro models, new Macs, and more. The iPads should be the first Apple tablets to feature Face ID and a design based on the iPhone X lineup.

Besides a new Apple Pencil, Apple could launch other accessories on Tuesday, including second-generation AirPods and the long-delayed AirPower charging pad.

You can watch tomorrow’s event from the Apple website, through the Events app on Apple TV, or on Twitter.