You can't edit the system ones however you have the ability to create your own and use one of the system charts as your starting point.
Add Palette > Copy Existing Palette (PolyNeon 40). Once created, you can rename or remove any of the colors to limit just the ones you keep as standard stock.
I did what you said above but for some reason i still can not delete, rename, change or do anything with the color palette.
It doesn't matter if i do
Add Palette => Create Empty Palette,
or
Add Palette => Copy Existing Palette
I do not have any option to add/delete any colors
(see attached pics)
What do I do wrong?
p.s - It won't let me do anything only in the Embroidery color palette, i have no problems with the Sublimation or Transfer color palettes