Use the shortcut keys!
The default shortcuts are something like,
c2-c3 = q to \ (top row of keys qwertyuiop[])
c3-c4 = a to ' (middle row of keys asdfghjkl;')
c4-c5 = z to / (bottom row of keys zxcvbnm,./)
so to input a c major chord (ceg), hit "a" in the first columm, "g" in the second column, and "k" in the third column.
However, I prefer to use FT2 shortcuts, where
"a" = c
"w" = c#
"s" = d
etc. etc. and then use the number keys 1-0 to select octave
The second method is the way FL does it, and I prefer it because it's much easier than thinking your way through all the keys a halfstep at the time.
I am but mad north north-west; when the wind is southerly I know a hawk from a handsaw - Hamlet, Hamlet