Change line colors
Initially, all grids are created using the default line palette.
To pick a different line color —
Tap one of the small color circles to change feature to that color.
To switch to a different palette —
 Tap Palettes icon on the right side tool bar
 Scroll through the predefined palettes
To create a custom 4-color line palette —
 Open the Palettes menu and scroll to an predefined palette that is the closest to what you want to create
 Tap '+ Add' .
Frustrated setting RGB colors?