a half of one dimension of the screen.

When {{pictureInPictureElement}} is set, the Picture-in-Picture window MUST

be visible, even when the [=document=]'s {{Window}} is not in [=Window/focus|focused=] or the [=document=]'s [=Document/visibility state=] is "hidden". The user

be visible, even when the [=document=]'s {{Window}} is not focused or the [=document=]'s [=Document/visibility state=] is "hidden". The user

agent SHOULD provide a way for users to manually close the Picture-in-Picture

window.

## Interaction with Page Visibility ## {#page-visibility}

The Picture-in-Picture window visibility MUST NOT be taken into account by the

user agent to determine if the <a>system visibility state</a> of a

user agent to determine if the <a>system visibility state</a> of a

<a for="/">traversable navigable</a> has changed.

## One Picture-in-Picture window ## {#one-pip-window}