Log into your website. You need to be an architect to create and edit views. 

Name your view. I typically create just 1 view for bulk operations and then add additional view pages for each content type that I want to be able to batch update.

Select the content type that you want to be able to batch update by clicking on  the dropdown that shows "All." For this example, I want to update an event content type, called "Festival Events." 

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By default, views will create a page. You want to use a page for this functionality, rather than a block. Name your page after the content type you selected. 

A view page needs a path. By default, Drupal creates a path for you based on what you named the view. I like to keep it as "bulk-operations" so it's easy to remember. 

For the Display format, you want to change it from the default "Unformatted list" to Bootstrap table. 

Bootstrap Accordion
Bootstrap Carousel
Bootstrap Grid
Bootstrap Media Object
Bootstrap Tab
Bootstrap Table
Bootstrap Thumbnails
Calendar
Grid
HTML list
Jump menu
Table
Unformatted list
Views Accordion
jCarousel

Click on "Continue & edit", which will take you to a new screen that will allow you to edit your new view further.

From here, you can add more fields if you want. This will completely depend on the content type that you chose. 

For this example, I want to be able to batch update the date of the festival events. So I need to add the date field of the festival event content type. This will then display as another column in the table next to the title of the event. 

Click the "Search" field to find the field that you want to add. 

I searched for "date" because I knew that the field was called "Date Time"

It will then bring up all the settings options for the field. I'm happy with what it is displaying and how it is labeled, so I'm going to click "Apply (all displays)." 

Now we'll add the bulk operations functionality. You do this by adding a field called "Bulk Operations." Click "Add"

Start typing "bulk operations" to get the field. 

Scroll down and click the "Modify entity values" field. This will give you access to the fields that you added to your content type and bulk update them. 

You can select any of the options here as needed. It depends on what you want to bulk update. 

I'm selecting all the fields for the Festival Event type because I want access to all of them. You can select any applicable fields.

I rearrange the bulk operations to be at the top of the fields list. This puts the checkbox to select your items in the table on the left. I think this is the easiest way to work with them. 

Click the down arrow next to "Add" for the fields section.

Move the bulk operations field to the top of the list and then click on "Apply (all displays)." 

Click "Save" to save all your work. If you click cancel, you'll undo everything that you have done and lose even creating the view. 

Then click "view Page" to see what you have created. 

Click the checkbox next to any of the items you want to update. 

Click "Choose an operation" and select "Modify entity values." 

- Choose an operation -
Modify entity values

Click "Execute." This doesn't do anything immediately. It will take you to the next screen that will give you the fields to modify. I need to change the date of these 2 events. 

Click "Date Time", which will then display more options for you to configure. 

Click the "Date" field to select the date from the calendar picker. 

Click on the date that you want to set the events to. 

Click "Next." This won't perform any action. It will always show you a confirmation message when you are changing entity values. 

You do want to be certain of the action you are taking. There is no undo button for bulk operations. 

You can find the same items and change them back, but the ease of doing this varies and depends on your selection process. For example, say you selected some items based on subjective criteria. If you manually waded through 200+ items and selected 27 of them, it would be difficult to go back and select those 27 items again.

Click "Confirm" to perform the bulk operation. It will show a progress bar and then a confirmation screen of what content it changed. 

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Bulk Operations View