The feature to scale and rotate vertices in the mesh edit mode has been a topic of discussion and request within the Spine community. As per the forum discussions, the ability to scale and rotate vertices directly in mesh edit mode is not currently available in Spine. However, this feature has been recognized as a valuable addition and has been officially requested on the Spine issue tracker (Mesh manipulation: rotate/scale vertices in edit mode · #60 · EsotericSoftware/spine-editor). The Spine team has acknowledged this request and added it to their list of features to consider for future updates. In the meantime, a workaround suggested involves binding vertices to bones and then rotating or scaling those bones as a method to achieve a similar effect.

We'll probably add showing numeric vertex positions before rotate/scale tools.