We will use the manage fields administrative page to add a Media field to our d8dev Recipe content type:
Open up the d8dev site in your favorite browser, click on the Structure link in the Admin toolbar, and then click on the Content types link.
Next, on the Content types administrative page, click on the Manage fields link for your Recipe content type:
Now, on the Manage fields administrative page, click on the Add field link. On the next screen, select Image from the Add a new field dropdown and Label as Recipe images. Click on the Save field settings button.
Next, on the Field settings page, select Unlimited as the allowed number of values. Click on the Save field settings button. On the next screen, leave all settings as they are and click on the Save settings button.
Next, on the Manage form display page, select widget Editable file for the Recipe images field and click on the Save button.
Now, on the Manage display...