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To set your filter to some default value, enter it in the field Default Values for Filters. If you want to specify a default value for other than the first field (e.g. City in the screen shot below), put comma-separated blank spaces for each field preceding it.
To set more than two or more default value for drop-down filter, separate these values with && as shown below.
How to use Table Filter with the JIRA Issues and Task Report add-ons
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Enter a filter field width in pixels in Filter Cells Width. To set individual parameters for each of the filters, separate the width values with commas.