Add zoom functionality for the third axis of data cube
Add zoom functionality for the third axis of data cube

glue-viz/glue-3d-viewer,astrofrog/debug-windows-vispy,astrofrog/glue-3d-viewer,glue-viz/glue-vispy-viewers,astrofrog/debug-windows-vispy,PennyQ/glue-3d-viewer,astrofrog/glue-vispy-viewers,PennyQ/astro-vispy