Info Required Modules: Blog
A. Modify Blog entry content type
Step 1 Go to Structure > Content Type.
Step 2 In Blog entry row, click "manage fields" link > Add "Image" field with following settings:
Step 3 Click "Save" > "Save field settings" button
> Set following properties:
Step 4 Click "Save settings" button
Step 5 Go to "Manage display" tab > Default tab, set following properties:
Step 6 Go to "Manage display" tab > Teaser tab, set following properties:
Step 7 Click "Save" button.