Metadata MetadataDouble click a layer in the Overlay Control Center and press M key to open metadata for the layer. Or right click on a layer and chose Metadata... from the list. This displays metadata for the selected overlay. The metadata dialog displayed depends on the type of the selected overlay. The metadata dialog for the download-able US National Map 1 ft Imagery is shown below.
For online sources, the source webpage will be displayed on the Additional tab in the Metadata Window. The Projection can be imported, exported (.prj) or changed from the 'Projection' tab, as well.
Additional tabs will also display for metadata specified in scripting, or recognized files in the same folder as the loaded data. The following file names will be recognized and loaded as additional metadata tabs:
Where C:\path\represents the full path to the loaded data, and filename represents the name of the loaded geospatial file.
For example loading the file C:\data\properties.shp would recognize and load the following metadata files in additional tabs:
Lidar data will display an additional tab indicating the point cloud statistics. For more information see Lidar Metadata and Statistics
The Histogram tab (below) is for raster images that contain RGB data, or terrain data and other single band rasters. This
tab will be displayed if the raster file has a band count between 1 and
3, or has a palette associated with it. 
The histogram data associated with the raster layer can be saved in the
workspace. For large files, creating the histogram can take a fair amount
of time. Having the histogram data saved in the workspace can reduce or
eliminates calculation time for subsequent use of the layer.
The Number
of Bins field is set to 15 by default, this number may be increased or
decreased, and the Histogram recalculated using the Refresh Graph option.
The histogram refresh will reflect cropping that has done to the raster layers using the Cropping settings on the Layer options.
Click and drag the border of the window to increase or decrease the width of the Histogram display. Use 'Export to CSV File...', to create a CSV file using the data from the histogram. The exported CSV file will contain the axis label for each point, and the X and Y values. Histograms can also be generated using the Graph and Chart tools.
The projection tab displays the projection interpretation for the selected layer. The display of the data will automatically be reprojected to the map display projection. If GeoCalc mode is enabled this will be replaced with the GeoCalc projection tab. The projection is viewable but not editable from this window. To modify the projection interpretation of the layer go to Layer Options.