Added a feature unique (as of date) to WebJCS 2: You can offset layer by N pixels! JJ2+ have support for it but no level editor has. See a demo here: https://youtu.be/DRkI-KRsR7o

Probably not a good idea to use on layer 4, because mask and events don't get moved. Use this to for example offset layer 5 by half a tile.

EDIT: Turns out it is an undocumented JJ2+ feature. Ah well, plus only then!