Shikabashi Are you referring to the ability to snap to pixels? If so, this is one of the features we've been wanting to add for a while, and here's the issue ticket:
EsotericSoftware/spine-editor554
As described in the issue comments, a snap function is already available for region attachments. Enabling `Pixels' will round the X/Y coordinates of the region attachment to the nearest integer, either 0 or 5.
