Little known to many, a highly useful feature has been introduced in your Office 365 SharePoint Online sites as part of a January 2018 update.
This feature allows you the ability to selectively update a several list item properties in one step within the modern list view by using the Details Pane.
The Message Center details for this feature (MC126885) is below:
It is fairly intuitive to use this new feature:
- Start by browsing to your SharePoint Online list ensuring you are in the modern experience
- Use the checkboxes in your modern list to select the list items you would like to edit
- Open the Details Pane by selecting the info icon
- Enter the values you would like for each list column property
- Click on the Save button
View more information on the feature here.