Expand/Extend multislices layer in the dashboard
When you create different slices of the same layer (with the slice editor), it automatically creates new layers into the dashboard. An Expand/Extend button would allows to see only the "reference" layer in the dashboard or all the slices layers if desired.
AdminPhilippe Chaurand (Admin, Millumin) commented
You can use lock the other layers, then go to the menubar, and click on "Layers" --> "Hide locked layers".