A birdcage (or bird cage) is a cage designed to house birds as pets. Antique (or antique-style) birdcages are often popular as collectors' items or as household decor but most are not suitable for housing live birds, being too small, or of unsafe materials or construction.ood quality cages designed for pet birds are more suitable. Most parrot cages are made or wrought iron and painted with a non-toxic paint referred to as powder-coating. However, the newest trend in the market is cages made of solid stainless steel.
A viewport is a 2D rectangle that defines the size of the rendering surface onto which a 3D scene is projected.
For exa. the annotations in the current viewport only include an Annotative object scale of 1:50 and you. want to change the viewport/annotation scale to 1:100, you can turn on this toggle so that the. new scale (1:100) is automatically added to all of the annotative objects within that viewport.