Once a filter has been set (see Finding Events), and if the currently logged-in user has sufficient permissions, Event List View will show a series of buttons across the top that perform batch operations on all of the events displayed with the filter in place, and under the current category and date settings.
The first button, Delete, will delete all of the events found by the filter. It will not delete their categories, even if the categories end up with no events, but it will delete all the events. Use it wisely. When you click the button, a Javascript dialog will ask for you to confirm the action. If you confirm it, your filtered events will disappear. If nothing happens when you click the Delete button link, then you probably don't have Javascript enabled in your browser.
The Relate button will force all of the filtered events to become related to each other. If any of them were previously related to another set of events, that relation will be replaced with this one. Again, a Javascript dialog will confirm the action, but if you proceed, there is no easy way to undo this operation.
The remaining buttons allow you to set information for the entire collection of filtered events that would otherwise have to be set individually using the Event Form.
The Title button will show a form that can set the title of all the filtered events to whatever you would like. Note that if the current filter uses the title, and you change all of the titles so that they no longer match the filter, all of the filtered events will seem to disappear. Just click the Unfilter button below the calendar to see everything again, or the Filter button to reconfigure the filter.
The Text button does the same thing for the description text fields of all the filtered events as the Title button does for the title. The same caveat applies, if the current filter is based upon the description.
The Time button allows you to set the start and end times for all of the filtered events. You can use 12- or 24-hour time.
The Category button allows you to set the category for all of the filtered events, or to put them into a new category that you can specify, just like on the Event Form.