Arcade's Tweak page is home to all of Arcade's advanced features. From here you can edit Samples, Modifiers, Macros, Modulation, apply Effects to your sounds in the Mixer, and edit global Playback Settings.
To open the Tweak page, click the Tweak button at the top of the Arcade window, to the right of the Kit name.
From here, click the headers at the top of the Tweak window to open different tabs. Click the X in the top right corner to close the Tweak window.