Toolbar buttons To the right of the main menubar are several toolbar buttons. These offer the following functionality:

• Brighter and Dimmer Each time one of these buttons, which look like light bulbs that are on and off, is tapped the limiting magnitude of the objects that will be displayed and their corresponding symbol brightness when drawn increases or decreases by one magnitude.
• Step back and Step forward Each time these are tapped they retard or advance the current PSC time by the amount specified in the Single Step field of the Time setup dialog.
• This button toggles whether the local horizon profile is drawn on the sky chart. See the Horizon dialog to define the shape of the profile.
• This button toggles whether the objects on the sky chart are labeled. See the Options dialog for count and formatting controls.
• This toggle activates measure mode by changing how the Sky acts when tapped with the stylus. When pushed in, tapping will mark the starting position with a small circle. Then dragging the stylus will display the current coordinates of the stylus position, how much each coordinate differs from the starting position, and the great circle arc length from the starting position. When popped out, tapping brings up the Sky popup menu.