The Send to Floor feature is a Labs feature that simulates the garment on a flat surface, without the avatar - like laying the garment on a tabletop.
To use the Send to Floor feature:
In Lotta or VStitcher, load the garment.
If the garment is not already dressed, on the Main toolbar, click Dress, then after a suitable time, click Finish.
On the Main Menu, click Garment, then Labs. Then click Send to Floor. In the 3D window, the avatar is no longer displayed.
On the Main toolbar, click Dress, then after a suitable time, click Finish. The garment is at the bottom of the 3D window.
Right-click the garment, then click Look At. Use your mouse to navigate the window so the garment displays as required.
To exit the feature:
In the 3D window, right-click away from the garment, then click Show Avatar.
On the Main toolbar, click Snapshots, then click a suitable snapshot.