If you click on the cog in the top right of the slider for the relevant morph(s), it opens a tab which has the parameters for the morph.
It does vary from morph to morph, depending on how extreme they are, but if you change the upper value to say 200% & then try the slider, that may have the effect you desire.
Thank you, I am using daz for sometime, but to make the models looks thicc muscler I always apply an extra morph. Most of them are full body morphs, how can I modify the base model with a full body morph so that one area of the body (For example ass) is effected without touching the others.
I also find the results mixed if I add extra morph, it sometimes deforms the model too much.
It requires some experimentation with various sliders to find the one that has effect on the desired area. You may well find that there isn't one for what you desire.
Sometimes over driving the full body morph might work.
Realistically, or reliably you can't. The details you're looking for don't exist in you're model.
You'll need to use additional morphs to target the areas you want. A product like Shape Shift will have area specific morphs you can use on top of your model to make the adjustments you want.
Failing that, you can export the model into a program like Blender, sculpt the detail you want and then reimport to Daz.