@Arda > If you're using the SX with Traktor, those hardware-labelled effects are not permanent. As the SX was designed for use with Serato DJ, the labels on the buttons are for those features. With Traktor, the controller acts as a MIDI device, allowing the user to customize what the hardware does in terms of assignments to software. If the configuration you're currently has the roll function assigned to a roll effect within the software, you can change that through the MIDI mapping assignments within Traktor itself.