Custom filters enable you to run LinkedIn Recruiter and LinkedIn Recruiter Lite searches more efficiently. Each custom filter consists of a combination of frequently used search filters. You can access your custom filters from the Recruiter search results page.
You can save multiple custom filters, each carrying a combination of search filters usable for a specific search type. Each user can save up to 50 custom filters. Once this limit is reached, if a user needs to save additional custom filters, then one or more saved custom filters must be deleted before new custom filters can be saved.
As the option to edit custom filters is not currently available, simply delete the custom filters that you feel can no longer be efficiently used.