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The Export Coverage dialog appears:

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Select a file, threshold and format: Histogram, Per base or Bedgraph, where threshold is the minimum coverage value to export. 
For Per base format the additional options are available: Export coverage value or Export bases quantity or both of them. 

Use the Compress the file checkbox to compress the file.

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The following parameters are available:

• Export to - select the result file path,
• Format - assembly coverage could be saved in three different formats:
  • Bedgraph - the coverage shown by columns. If several columns in a row have the same occurrence, they will be joint into one column.
  • Histogram - shows coverage by frequency of occurrence. That is, a row is deciphered as a column number N with coverage X occurs in an assembly of a length L and the total occurrence rate is Z:
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  • Per base - similar to BaseGraph, but without columns merging.
    • Export coverage value - add coverage for each base (how many reads in the column).
    • Export bases quantity - add the amount of A, C, G and T.
• Threshold - consider the column only if it hase more reads than set by this parameter.
• Compress the file - archive as .gz.