The Overview pane shows an overview of the entire Monitor session. You can navigate through the session using the Marquee tool, which is the box inside the Overview pane.
Active synchronizations, completed synchronizations, and failed synchronizations are represented with colors. To set the colors, open the Monitor, choose Tools > Options, and then click the Overview tab.
See Options dialog.
You can close the Overview pane by deselecting the Overview Pane in the View menu.
You can also separate the Overview pane from the rest of the Monitor window. In the Options dialog, open the Overview tab and clear the Keep Overview Window Attached to Main Window checkbox.
The Marquee tool is the small box that appears in the Overview pane. You can use the Marquee tool to see different data, or to see data at different granularity. The area represented within the box is displayed in the Chart and Graph panes. You can use the Marquee tool as follows:
Click in the Overview pane to move the Marquee tool (and thus move the start time of the data shown in the Chart or Utilization Graph).
Drag in the Overview pane to redraw the Marquee tool to change the Marquee tool's location and size (and thus change the start time and the range of data). If you make the marquee box smaller, you shorten the interval of the visible data in the Chart, which makes more detail visible.
The default color for the outline of the Marquee tool is black. To change the color of the Marquee tool, choose File > Options, open the Overview tab, and select a color in the Marquee section.