When you click on an item from the catalogs, four buttons appear:
The first is the i-button which opens the Property Inspector. There you can change the object's size, colour, angle and x/y/z values. If the object is from the Brands catalog, then the size and the colour values could be locked when there are no variation for this product.
The second button is the 'Configure button'. The view is switched to a standalone view of the product. You can configure the product by changing the parameter available on the right side of the screen.
The third button is the 'Duplicate button' - this is especially useful if you are going to use the same object with these exact measurements several times. For example, to draw fence around your house or if you have standard windows at home.
The last button (the trash bin) is the 'Delete button'.
For some products the Flip / Mirror function is available - when you use it, you can get a mirror orientation of the object - there are four possible orientations. This function is especially useful when you wish to change which way to open doors or windows.