Unlike Coohom for iPad, Coohom for Desktop paints the entire room by default once you drag the finish to a wall. If you want to paint only one wall at a time, please:
1. Click Model Library ＞ Finishes in the left panel of our 3D floor planner.
2. Switch to 3D in the footer.
3. Decide the category of your target finish under Finishes and pick one from the left panel.
4. Hold down Ctrl and drag it to the target wall.