Quick Edit is a new feature introduced in SharePoint 2013. It enables you to edit all the list items. It replaces Datasheet View in SharePoint 2010.
Step 1: Click “Edit this list”.
Step 2: All the list items appear in a Datasheet view and enable you to edit all the list items at the same time.
Step 3: To disable the Quick Edit, go to the List Settings and make the following changes.
Save the changes.
Step 4: Edit this item disappears from your Share Point List.
The Quick Edit Option is greyed out.