In this blog post they show an example with the cloth brush and collision: https://code.blender.org/2020/10/cloth-sculpting-improvements-in-blender-2-91/
This is the video of where they show it: https://code.blender.org/wp-content/uploads/2020/10/Cloth_Collisions.mp4
I was wondering, how can I achieve this? I can't grab with that tool for example. Sorry my question is a bit vague, I don't have the vocabulary nor knowledge to express what I want.