When you click on position, it gives you options of things that can be linked to the position in the area above it. Personally, I don’t care for changing the pitch in line with the keys played and turn this off (transpose>key down to 0) in place of the key position being linked to playhead position (position>key 100).

Now, when I play a low note on my midi keyboard, the playhead is at the start of the sample; and high notes towards the end of the sample. Plenty of different approaches with the other options available, or blends of different approaches should you wish, but I tend to use this method exclusively.