Most lists in Event Temple that have a checkbox will allow you to batch select, and then make an update.
Open the tab (or subtab) you wish to perform Batch Actions on (Bookings, Events, Menu Items, etc)
Select the checkbox at the top of the list or check the boxes next to the items you wish to edit
A drop down will appear at the top
Click the drop-down
Select the action you with to perform
Click the Apply button
Creating Multiple Events During Booking Setup
While this article focuses on editing existing items, you can create multiple Dvents at once when first setting up a Booking:
Check "This booking has events" during Booking creation
Use the batch events tool to set up all events at once
Need to edit these later? Use the Batch Update Tool in your Events tab
For full details, see Creating Events.
Batch updates work per page, meaning if you have more than 25 entries, you will have to update page at a time