How can I use the performance pads? Can I switch the mode?

It depends on your application.

[WeDJ for iPhone]
You can use [HOT CUE], [LOOP], [PAD FX] and [SAMPLER].
The above buttons are displayed on the screen after the Bluetooth connection is established.
By tapping the buttons, you can change the mode.

[WeDJ for Android]
You can use [HOT CUE], [AUTO LOOP], [MANUAL LOOP], [PAD FX] and [SAMPLER].
[PAD MODE SELECT] buttons are displayed on the screen after the Bluetooth connection is established.
By tapping the buttons, you can change the mode.

[djay]
You can't change the pad mode.
You can control Beat Loops, Bounce Loops, and Hot Cues.

[edjing Mix]
You can't change the pad mode.
You can control Hot Cues.

[rekordbox]
You can use [HOT CUE], [BEAT LOOP], [PAD FX1] and [SAMPLER].
The above buttons are displayed on the screen after the USB connection is established.
By tapping the buttons, you can change the mode.