If you want to create a mosaicked raster dataset from the mosaic dataset, you can use the Copy Raster tool or you can export the Image sublayer in ArcMap to a raster dataset (as described in the steps below).
To access the Copy Raster tool, you can open it directly, or in ArcCatalog or the Catalog window, right-click a mosaic dataset and click Export > Raster To Different Format.
- In ArcMap, expand the mosaic layer.
- Right-click the Image layer and click Export Data.
The Export Mosaic Dataset Data dialog box opens.
- Choose values for Extent and Spatial Reference for the raster dataset.
- Choose the rendering and cell size parameters for the raster dataset.
- Choose the output name, location, and format properties.
- Click Save.
The raster dataset is created.