Region definitions are ordinary 3- or 4-field bed file format. For example:

    #  comment lines can be included starting with the # symbol
    chrX   151073054   151173000
    chrX   151183000   151190000  optionalRegionName
    chrX   151283000   151290000
    chrX   151383000   151390000

There is a limit of 1,000 defined regions. Using the upload file function will replace any existing regions. The fourth field, name, is optional and for notation purposes only, it is not used in the table browser. These are 0-relative coordinates, first base on a chromosome is 0.

Coordinates can also be entered in the form:

    chrX:151,283,001-151,290,000  optionalRegionName

These are 1-relative coordinates, first base on a chromosome is 1.