Print it, but it really easy to memorize though

just keep playing and you will see a pattern in the keys emerge

do it the old - fashion way paper and pencil, but usually the keys are assuming default.

for all ships

ability 0 - q

ability 1 - w

abiltiy 2 - e

abiltiy 3 - r

(if on cap ship) Ability management - t

attack - a

stop - s

jump or movement - d

fleet - f

squad - g

(and when in squad)

fighter - q

bomber - w

planet screen

planet research - q

(and when in planet research)

population - q

health - w

artifacts - e

homeworld - r

logistic - a

tatical - s

Those are the most basic keys you probably will need, as you can see there is a pattern in all of this it takes the first 5 lettered keys of the top 2 row for basic command

press prtsc, and keep scroll till you get all of them and then print the images