Ruler: Double-click a ruler to create a guideline at the selected position. Guidelines can also be added/removed/modified in the “Document” tab of the Inspector.
Workbench: The checkerboard pattern indicates transparency. The background can be changed in the "Document Inspector". You can also set a default background for new compositions in the preferences of Composition Builder.
Safe-Zones: There are action- and title-safe-zones shown optionally. They can be enabled/disabled in the “View” menu, and customised in the “Document” tab of the inspector.
Components: All the elements shown in a composition are called components. This example shows the “TNN News” sample composition with 19 different components like background images, text elements and a realtime clock.