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## Changing filters

A filter is a pattern that is applied to the files in the File list to determine whether or not they should show up in the list. This mechanism allows the user to exclude many files from the list based on a naming convention, which is useful since VisIt's data files often share some part of their names.

The Filter text field controls the filter used to display files in the file list. Changing the filter will often change the File list as files are shown or hidden. The Filter text field accepts standard UNIXTM C-Shell pattern matching, where, for example, a "*" matches filter ("*") shows all files in the File list. Note that you can specify more than one filter provided you separate them with a space.