Modify Article content type

A. Modify Article Content Type

Step 1 Go to Structure > Content type. Click "manage fields" link in line Article

Step 2 Create "Categories" field following properties:

Step 3 Click "Save " button. New window is opened. Set following properties:

Step 4 Click "Save field settings " button. Click "Save settings " button

B. Create some articles

Step 1 Go to Content. Click "Add content" link. Choose "Article" link.

Step 2 Add an article with following setting:

Step 3 Repeat steps 1-2 to add several articles.