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Graph tracks, such as these, can be saved as .wig formatted files. See Saving and Sharing Data.

Depth Graph

You can generate an overview of the relative density of annotation coverage across an entire chromosome.  This feature dynamically graphs the number of annotations in a track that are present at each nucleotide across the genomic sequence. When you are completely zoomed in, and each pixel represents a single nucleotide base, the graph shows actual values for the number of reads aligned at that genomic location. Using the Select tool to hover over a particular point in the graph will open a tooltip with the actual number of reads at that point.

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