To select the straight key or keyer paddle must be in CW mode.
My FT817 is non-ND, my manual shows CW transmissions on page 32, might be different for yours.
For selecting key or keyer paddle with built in keyer operation:
1. F key and go to menu 10
2. [VOX,BK,KYR] will show.
For straight key there should be no arrow at KYR, for keyer paddle arrow showing.
BK turns on/off the rig xmting when key pressed.? If off can hear CW tone, but rig will not xmt.? If on will act like VOX in SSB, just key on pressing key.
Again must be in CW mode.
There are other setting in other menus for CW like pitch, delay (hang time) and sidetone level.
73, ron, n9ee/r