I was trying it on a Trex. I couldn't figure out how to do it. Ended up using a console command force taming and taming them
I haven't used it with the current trainer version, but it's always worked for me in the past. You enable the option, then knock a dino out however you want. Then, put some of the appropriate food into the dino's inventory. When the dino next eats, it will be instantly tamed. How long it takes for the dino to eat depends on the dino's hunger meter. Some dinos get hungry faster than others. Note that you can't force feed a dino to make this work; you have to wait for them to eat on their own.
does anyone have the problem where deactivating the easy crafting option causes the game to crash? seems to have started with the previous trainer version the 214.4 auto update.
Yeah, I posted about that a while back. Never got a response.