Each toolbar button has a flyover, which pops up on a mouse-over. The status bar is at the bottom of the Main window. The large box on the status bar changes according to the mouse-over on the Diagram pane. That button pops up the Diagram Options window to let you show or hide different kinds of diagram content. They give quick access to common element tasks.
Many elements also have properties inspectors for easy extensive customization.
Most speedmenus list properties inspectors among their choices. The snapshot below on the shows a class speedmenu in the back with a properties inspector superimposed in front. To get to a class speedmenu, right click on the class in the Diagram or Explorer pane. The second item on the speedmenu is Properties. Clicking the pushpin on the Properties Inspector docks it on the bottom of the Explorer pane.