Twitter tests bigger pictures in timeline

Twitter is testing new changes to how photos and videos appear on its apps, closer to how images appear on other services such as Instagram.

The new feature will expand visual media embedded in tweets to fill the whole width of a mobile phone's screen.

Currently, images are indented next to a user's profile photo and take up much less screen space.

Twitter said the new layout - being tested on iOS but not Android - would give media "more room to shine".

The experimental changes to fuel content creation and consumption come amid a rollout of Twitter's subscription service for dedicated users, Twitter Blue.