Mackie C4 Channel Strip overlay in Logic Pro

The Channel Strip overlay is active when the CHAN STRIP button light is on.

V-Pot/V-Select row 1 (V-Pots 1 to 8) edits the frequency and gain of EQ bands 3 to 6 (the parametric bands), provided an EQ effect is inserted in the current channel strip.
V-Pot/V-Select row 2 (V-Pots 9 to 16) switches to Effect Edit mode for Inserts 1 to 8, provided an effect is inserted in the respective Insert slot. If no effect is inserted, turn the respective V-Pot to select an effect, then press the V-Select, to insert it.
V-Pot/V-Select row 3 (V-Pots 17 to 24) edits Send 1 to 8 Level, provided the current channel has active sends.
V-Pot/V-Select 25 switches to Instrument Edit mode, provided the selected channel is routed to an instrument channel, and an instrument plug-in is inserted.
V-Pot/V-Select 26 edits the channel output destination.
V-Pot/V-Select 27 sets the automation mode.
V-Pot/V-Select 28 edits group membership.
V-Pot/V-Select 29 edits volume.
V-Pot/V-Select 30 edits pan/surround angle (for surround channels).
V-Pot/V-Select 31 edits surround diversity.
V-Pot/V-Select 32 sets the channel input format.

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Control Surfaces Support Guide for Logic Pro X