To open the Sample Edit page navigate to the Tweak button to the right of the Kit name in Arcade. This will open up the last played Sample into the Sample Edit menu:
From here you can edit any parameter of the Sample, such as speed, tuning, and even filtering.
The top bar of the Sample Edit page contains the name of the Sample you are currently editing. The Keyboard icon in the upper right corner of the Sample Edit page toggles MIDI Follow on and off.
When selected, the Sample Edit page will show the most recently MIDI triggered Sample voice. When MIDI Follow is deselected, the Sample Edit page will remain on the currently selected Sample regardless of the notes being played.
The X icon to the right of the MIDI Follow button allows you to exit from the Sample Edit Page.