Make changes to lots of events
You could do this using chaining in the API, either by script or with the API Explorer.

Eg:

$result = civicrm_api3('Event', 'get', [
  'sequential' =&gt; 1,
  'options' =&gt; ['limit' =&gt; 0],
  'event_type_id' =&gt; "Fundraiser",
  'api.Event.create' =&gt; ['id' =&gt; "\$value.id", 'event_type_id' =&gt; "Meeting"],
]);


Or in words: find all the events of type Fundraiser.  For each one, use the 'create' API call with the id of the found event and set the type to Meeting.

To run this in API Explorer you need to enter the chained part as json: