There are 5 buttons, each can give access to one or two functions depending if you push it briefly or hold it for more than a second. You can read below a list of short press and long press actions and expected behavior.

The F-clef button is dedicated to scale selection when short pressed.

Scale changes will affect the current active layout e.g. changing the scale to G Minor will affect all Keygrids (defined in section XX.XX) or standard keyboard keys in the displayed layout. 

‍Important feature: By enabling the chromatic mode by pressing on CH, both keygrids and keys will display every chromatic note, but will “color” only keys from the selected scale. Off-scale notes appear greyed out.

When long pressing on the F-clef button you can access Midi channel and Control Change (CC’s) settings for dynamic mappings

The mapping mode main purpose is to send your DAW or synth the control change corresponding to the different touch dimensions: X , Y , Z , |X| and |Y|. It also displays the channel number from the active element on current layout. 

Here is a description of these 5 dimensions:

Example: Say you want to map the absolute Y axis (|Y|) from your current keyboard grid layout to a filter cutoff. You would need to select your mapping mode in your DAW (or plug-in) press |Y| on the Erae Touch and as a result the vertical axis from each key on your current keyboard layout would be mapped to CC 134 with 0-value at the bottom of the key and 127 at the top.  

A layout is a single screen that is made of one or several elements (see section xx for elements catalogue). Each layout constitutes an instrument on its own, with a specific arrangement of keys, pads, sliders, etc. The ERAE Touch can store 32 layouts. We name “Main” the main layouts in slot 1,2,...n and “Alt” the alt layout in Alt slot.Main layouts are numbered from 1 to 16 and Alt layouts from 1alt  to 16alt.
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We explain in this section how these layouts are accessed and arranged. We also describe the factory layouts that are pre-loaded in the ERAE Touch. For custom layout creation, please refer to the ERAE Lab section xxx.

Elements, described in this section, are the building blocks to all layouts (defined in section xxx) . A layout can be composed with one or several elements. They can be positioned, duplicated, edited and removed however you need in the ERAE Lab (defined in section xxx). We describe element sizes using the following notation: NxM represents the size of any element with N being the number on LED lines and M the number of LED columns.

Page selector: ADD PICTO OF PAGE SELECTOR
The page selector indicates the sequence pages with the current one being highlighted in red (white for the first page). It also provides access directly by pressing on their respective bars in order to edit them.
Sequencer options: ADD PICTO OF SEQUENCER OPTIONS (BLUE CIRCLE)



Click on the blue circle to access all the sequencer four options: memory slots, time divisions, BPM control and number of steps. They are laid out as follow:






- Memory slots (top left):16 cells corresponding to 16 internal memory slots, each containing up to 4 pages of sequence
      ADD PICTO OF MEMORY SLOTS of numbers and highlighted example eg. show slot 2 being selected
- Time division “DIV” (top right):
Time division sets the number of beats per time step. The first digit is the number of beats, while the second digit corresponds to the number of divisions. Hence, setting the 1:16 time division would play 16 steps in one beat, while a 2:1 setting would playone step every two beats.
ADD PICTO OF DIV genre            number of beats →  1:16 ← number of steps

- BPM selector “EXT/BPM” (bottom left):The BPM selector allows you to switch between slave and master modes. Slave mode “EXT” would draw the Beat Per Minute from your DAW or synth clock. Master mode “EXT” uses the ERAE internal clock.
ADD PICTO OF EXT/BPM genre           master mode (ERAE Touch internal clock) →  EXT/BPM ←slave mode (DAW or synth clock)
- Number of steps “STEP” (bottom right): Choose here the number of steps you wish to cycle through. Set to 4 or 32 (check), it respectively cycles every 4 beats or 32 beats. 
Quick overview:  
You can play notes directly on the leftmost vertical piano roll (diatonic scales only), and fill the grid by tapping any of the 16 cells. By default, you are on page 1, with 16 steps cycle, a 1:4 division and BPM set to 120. By default, the sequencer uses the DAW clock and is thus set to EXT.

MIDI effects can be accessed on a pop-up bar by long pressing the “alt” button There are four MIDI effects: Harmonizer, Repeater, Arpeggiator, Delay. Press any FX selection button picto to unfold the corresponding midi effect. Press their respective on/off button to trigger them on/off. Effects can be played on the fly and chained together. These effects are applicable on any layouts apart from the Ableton Launchpad and Sequencer.

The ERAE Touch silicon material is flexible by nature. This same property enabling deformation under your finger’s pressure may have a drawback: it moves slightly when you carry around the ERAE Touch vertically or when it is pressed against another object. The Force Resistive Sensors being highly sensitive to any pressure, it can sense any tiny deformation of the silicon and lead to unwanted noise or wrong note generation. Therefore, like a guitar needing to be re-tuned after a certain time, the ERAE Touch needs calibration. A calibration is similar to a tare weighing operation, where the ERAE Touch determines the amount of pressure equivalent to zero in a specific zone, meaning it is not detecting any touch  
ERAE Touch can be calibrated in three different ways, you can either opt for an automatic calibration, semi-automatic or do a manual calibration. There are two possible issues to be solved with calibration:
“Ghost notes” are random and rapid bursts of false positives, positives being a finger detection
“Stuck notes” are a worst version of ghost notes where the rapid burst becomes long and steady. 

To recap, this is how the 32 layouts are arranged in 16 slots, where “Alt” layouts are accessed from the “Main” layouts by short pressing the alt button.