Following seated calves and standing calves are Donkey Calf Raises.
Seated calves hit slow twitch higher rep soleus.
Standing hit fast twitch lower rep gastrocnemius.
However, like dumbell flies to pecs, donkey calf raises are a must for full calf development.
It’s the torso movement’s fore - aft horizontal component that’s responsible for this via weight and angle:
As you descend from the top fully contracted position, your body moves aft with the horizontal component of your heel’s movement. This! allows you to stretch further because you now have more weight over the heel. Also, the stretch at the hip joint increases since the feet “move” forward relative to your horizontal core. Correspondingly, the uppermost position moves your horizontal torso forward so more weight is on your arms and you can achieve a more shortened peak contraction. And here, the angle at the hip is slightly reduced to aid this lessening of the pre stretch as well.
Remaining cognizant of and playing with this aspect should help you to see that, like flies, you can stretch the crap (in this case, out of the origin, since the hamstrings tie in under the gastrocnemius) out of the muscle at a more fully stretched positioning.
Do not crisscross your execution or the mid flex will be over trained. If you “duck foot” to hit the lateral portion and you sink down with the lateral portion of your heel lower, then, on the way up, contract with that same LATERAL portion of the calf to have it higher in the fully contracted position. Visualize that squared footrest as a left to right hinged hardware.
Or, when executing pigeon toed reps, stretch the inside on the way down and contract the inside medial portion on the way up.
Hope this helps.