How do you make Daz morphs?

Can you explain the process of creating Daz morphs? I'm curious about the steps involved in shaping and customizing 3D characters in Daz Studio. Is it a matter of manipulating existing meshes, or do you have to start from scratch? Are there any specialized tools or techniques that are essential for achieving high-quality results? Additionally, how do you ensure that the morphs you create are seamless and blend well with the original model? I'd appreciate any insights you can offer on this topic.