The middle finger is typically used to press the "D" key on a standard QWERTY keyboard when touch typing.
When touch typing, your fingers rest on the home row keys (ASDF JKL;) and then move to the appropriate keys as needed. The "D" key is directly above the "E" key, and to the left of the "F" key.
- Left Hand Placement:
- Index finger rests on F
- Middle finger rests on D
- Ring finger rests on S
- Pinky finger rests on A
Therefore, to type the "D" key, you move your middle finger from its resting position on the "E" key upwards, striking the "D" key. The index finger controls F, R, V, and G keys.