See which context is used on a page when looking at the page When you are watching a page, is there a quick way for seeing all of the contexts that are being applied? Ideally I would like to be able to see which context is responsible per the blocks.
You can use the active context api to get this done.,

$contexts = context_active_contexts();
print_r (array_keys($contexts));


Place the above code in your form_alter or in any hook_node_view. This will list the active context in the page.