#### Chart Display - Histogram Chart

The Histogram Chart Display Options dialog box lets you select the reference lines that will appear on the Histogram Chart.

To access this dialog box, click on the Chart Options icon on the Charts tab. Then under the Chart Display menu, select Histogram.

Histogram Chart Display Options dialog box

Reference lines - The histogram can include any of the following reference lines:

- Spec limit (upper and lower specification limits)

- Control limit (upper and lower control limits)

- Nominal

- Mean

- Sigma

- 2, 3, 4, 5, or 6 sigma limits