Displaying article image on full display conditionally I would like to enable/disable visibility of article image on full display for some articles while keeping article image always visible on teaser display. Is there a way to achieve that apart from dealing with views?

Thanks.
You have to use Field formatter conditions module to achieve this goal.

First thing attach a field on desired content type with boolean value and then use this field value as a condition in field formatter settings to display other fields as you want.

For more information go through the module documentation.