Here's a little list I created.

CS18 WORKING FEATURES

Faders, Mute, Solo, Select, Pan

Faders control DAW faders
Busses are in “Mix Masters”
FX Busses are in “Returns”
“Mute” mutes DAW channels
“Solo” solos DAW channels
Pan is controlled by 16 encoder knobs at the top and can also be controlled by encoder under the Touchscreen for currently selected track.
Select button color matches Studio One channel color

Scribble strip

Shows:
channel name
Automation mode
Pan
Control Link parameter for Plugins

Record arm

Hold "Option" and press channel "Select" to toggle record arm on/off per channel. When in record arm the scribble strip will display a large "R" to indicate an armed channel

Channel layer navigation

Channels 1-16, 17-32, and so on. Press Shift and channel layer to go to channels 65-128. Press CTRL and channel layer to go to channels 129-192.
(Not implemented) Groups button used for mixer "scenes". Select a scene to hide channels not in the scene. Option to add a scene/group, page to show selected group with exit and delete buttons.
FX/Aux Returns button show FX channels
Mix Masters button shows buses
Group Masters button shows output channels

Flex Fader

Pressing “Edit” in “Assign” section will assign currently selected channel to the Flex Fader

Mix navigation

Press Main Mix button to have the main L/R mix on faders
Press Mix button 1 - 8 once to bring the associated send mix to the faders. Mix number corresponds with Send slot numbering from top to bottom
Press Mix button 9 - 16 once to bring the associated cue mix to the faders. Mix number 9 - 16 corresponds with Cue Mix slot from top to bottom

Automation modes

Uses Mute group buttons.
All On = All Read
1 = Read
2 = Touch
3 = Latch
4 = Write
5 = All Read
6 = All Touch
7 = All Latch
8 = none

Transport

Uses Transport buttons as labeled
Modifiers for additional funcitons
“Option” engaged - Stop is “Fast Forward;” RTZ is “Rewind”
“Ctrl” engaged - Stop is “Next Marker;” RTZ is “Prev Marker”

Solo clear

Clear and channels that are “Solo” enabled

FX Inserts/Sends

Tapping FX on Touchscreen opens list of Inserts or Sends for selected channel
Inserts - shows top down list of plugins on channel
Sends - shows top down list of sends on channel
Tapping plugin in Inserts list will map plugin parameters to 16 encoders
Parameter names show in 16 mini screens per channel
Parameter value shows in Touchscreen and via meter bridge
Tapping again dismisses plugin from computer screen and unlinks plugin parameters from encoders
Tapping Sends will select it.
Send level controlled by encoder below touchscreen

Jog Function

The knob under the touch screen can be used as a "Jog" when enabled from the Markers button and then hitting "JOG" at the top of the screen.

Control Link Mode

De-activating all buttons to the left of the "Selected Channel" meters, activates the Fat Channel for Control Link assigning of the knobs and buttons.

Foot Switch

Make sure the CS18 is in DAW mode
Select "System"
Now go to Footswitch Mode
Press it and you will now see a drop down
If you can not see the DAW options, select the last option and then select again.
You will now see 2 DAW options "DAW Rec/Start" and "DAW Drop Markers"
Select the one you need and then press home.