The Codesign sketchbook is the digital equivalent of your old trusty black notebook (most likely a Moleskin!)
With the sketchbook you can create as many drawings (pages) as you require to capture notes, ideas, and test out your concepts.
To access the sketch book click the second button in the top left View toolbar.
The sketchbook opens with a blank canvas along with a series of drawing tools.
On the right hand side you have a slider to adjust the thickness of your current drawing tool, a button to change colour.
As you change colours a palette of your 8 most recent colours is created so you can quickly jump between these.
Open the Layer palette with the button in the top right:
The layer palette works like other drawing apps.
Add layers with the + button at the bottom of the palette
Double tap a layer to rename or delete it.
A single-tap on the eye will toggle the layer visibility
Clicking the name of the Sketch on the right side of the toolbar opens the full notebook / Gallery.
The Gallery allows you to export and share all sketches or a selection: