Planner 5D doesn’t currently support swapping one furniture item for another in a single step.
To replace an item (for example, a sofa with a sectional), you’ll need to remove the existing item and then add the new one manually.
Steps
Open your project and go to the room where the item is placed.
Select the item you want to replace (e.g., the sofa).
Remove it:
Click/tap Delete (or the trash/bin icon), depending on your platform.
Open the catalog.
Browse or search for the item you want to add.
Select the new item and place it in the room.
Adjust its position (and rotate it if needed) to fit your layout.
Tip: If you want to keep the same style, take note of the original item’s size and placement before deleting it, then place the new furniture in the same spot and fine-tune from there.