Hover a cubik and press Tab to open the Block Editor (facet editor). Then:
- select one facet or multiple facets (hold Shift for multi-select),
- choose the replacement facet type,
- choose a color,
- click Replace Facets to apply changes.
When you’re done, click anywhere outside the editor panel to close it. After that, the editor will place this edited cubik under your cursor, and you can insert it as many times as you want.
To switch what you place next, just pick another cubik/color in the left menu.