Behaviour before the PR is merged : There is no indication that the user can exit fullscreen by pressing on escape. Desired behaviour after PR is merged : An indication is shown to the user after he enters fullscreen, which disappear after a few seconds. A new widget FullscreenIndication is available. Part of https://github.com/odoo/odoo/pull/65255 task-2438556 closes odoo/odoo#65255 Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>