Hi folks. I'm inflating a logo using vellum sops. after a while I want to deflate the logo to its original position and mesh. Inflating is ok but I couldn't figure out the deflating part. How can I do that?

you need to be more specific if you want us to understand your exact workflow, there is many ways to even do inflate and how to deflate may depend on the specific way you are using

assuming you are doing your inflation in Vellum Constraint Properties DOP by animating rest length scale of your Pressure constraints
so to deflate decrease the Rest Length Scale of Pressure constraints back to 1

and if you really want the position to align with the original make sure to create Soft Pin constraints beforehand with 0 or very low stiffness and increase it gradually during deflating to force your geo points to return to their initial pos