Modify Article content type

Step 1 Go to Structure > Content Type.

Step 2 In Article entry row, click "manage fields" link.

Step 3 Create "Category" field with following settings:

Step 4 Click "Save" button > New window is opened > Seclect Vocabulary = Categories, then click "Save field settings" button , set following properties:

Step 5 Click "Save settings" button.

Step 6 Edit Image field with following settings:

Step 7 Go to "Manage display" tab > Default tab, set following properties:

Step 8 Go to "Manage display" tab > Teaser tab, set following properties:

Step 9 Click "Save" button.