You cannot place plants or entourage in perspective views, elevation views, or section views.
Where is it?
To move the object, drag it to the desired location. To rotate the object, select it and press Spacebar to rotate 90 degrees, or use the Rotate tool to rotate to a specific position.
The 3D view displays placeholders for entourage. When you render the image, the entourage objects are rendered in detail. See Rendering an Image.