REM - This is a comment line for ducky, but I use it to tell the board the name of the button and the color.
STRING - This will write everything next to this word.
DELAY - This will wait for milliseconds the number next to the word.
CTRL - is the Control Key
ALT - is the Alt Key
ENTER - is the enter key
SHIFT - is the shift key
GUI or WINDOWS - is the Windows key
UP or UPARROW - is the up arrow key
DOWN or DOWNARROW - is the down arrow key
LEFT or LEFTARROW - is the left arrow key
RIGHT or RIGHTARROW - is the right arrow key
DELETE - is the delete key
PAGEUP - is the PageUp key
PAGEDOWN - is the PageDown key
HOME - is the Home Key
ESC - is the Escape Key
INSERT - is the Insert Key
TAB - is the Tab Key
END - is the End Key
CAPSLOCK - is the Caps Lock key
F1 to F12 - are the F1 to F12 keys
BRDOWN - Brightness Up, will decrease the brightness
BRUP - Brightness Up, will increase the brightness
SAVEBR - will save the Brightness into a config.txt file
If you want to press a regular Key just write the lowercase letter or the number.
there will be more keys supported in the future. Also for MAC users.