The Data Selection dialog appears when you select one of these File > Save As options from the menu bar:
            
            The Data Selection dialog also appears when you are using a tool or workflow and are prompted to select an input file. In the tool or worlflow dialog, click the Browse button 
 next to the input field.
            Open Files
             
                - To open a file from disk, click the Open File icon 
 in the Data Selection dialog. In the Open dialog that appears, select an input file and click Open.  
                - To select a recently-opened file, click the Open Recent icon 
 and select a file to open from the list. 
                - To access a remote dataset using the Open Remote Dataset dialog, click the Open Remote Dataset icon 
. 
            
            Opened files will be added to the Select Raster list.
            Subsets and Masks
            You can specify a subset of the image to perform the processing on, rather than use the full extent in image processing. See the following for subsetting details:
            
            You can also apply a mask to exclude certain pixels from image processing. See Masks for details.