The Stretched option of the Renderer is applied to a multiband raster and the Symbology window is closed. If the Symbology window is reopened, another band selected, and the Histogram button is clicked, the displayed histogram remains as that of the previous band displayed.
The histogram does not update until you click the Apply button.
Solution or Workaround
To view the correct histogram for the band you have selected, do the following:
- Right-click the multiband raster layer in the table of contents of ArcMap and click Properties.
- Click the Symbology tab, then click the Band dropdown and select the band whose histogram you want to display.
- Click Apply.
- Click the Histogram button.
The histogram will displayed the information of the selected band.