# General Summary (Performance)

This section is very similar to the Subnet Performance section on the Home tab. It organizes charts line-by-line to allow a user to look at the details of the charts. It also supports different data traffic types via the drop-down menu on the title bar.

The supported traffic types include:

- Internal - internal data traffic within a device set

- Send - data sent from a device set

- Transmit - data received from the outside

- External - the sum of send and transmit, i.e., the total data traffic with the outside

- All - the sum of internal, send, and transmit

The General Summary contains the following sections:

- Trend (Performance)

- Top N Chart

- Histogram

The combination of the Trend (Performance), Top N Chart, and Histogram charts provide mixed insights about the history, the present, and the global and local performance over the ports.

On the bottom of the charts panel are the trend thumbnails of available metrics. Click on a thumbnail to bring the metric to the front.

To zoom an area of the chart, choose one of these methods:

- Using your mouse, draw a rectangle on the chart where you want to zoom.

  OR

- Right-click over the rectangle and select Zoom In or Zoom Out, then choose Both Axes, Domain Axis, or Range Axis.

To return to the original scale after zooming in/out, click and drag the mouse upward.