I looked for a moment how to have Home Assistant in full screen without the left sidebar.

Finally, it is very simple.

You have to use HACS and install kiosk mode

Once installed, you must add ?kiosk at the end of the url and the turn is played. see below all options

Thus, thanks to the two previous tutorials written for Jeedom, with the same logic, you can have Home Assistant in full screen on a touch screen:

• Launch two instances of Jeedom (Chrome) on two monitors on the same PC
• Launch Jeedom on two screens (dual-screen), two instances of Chrome

Options of the kiosk mode module

The query string options are:

• ?kioskto hide both the header and sidebar
• ?hide _header to hide only the header
• Hide _sidebar to hide only the sidebar
• ?hide_overflow to hide the menu at the top right
• ?hide _menubutton to hide the sidebar menu button
• ?hide_account to hide the account icon
• ?hide_search to hide the search icon
• ?hide_assistant to hide the wizard icon
• ?hide_edit _dashboard to hide the "Edit Dashboard" button in the top right menu

• ?hide_refresh to hide the "Refresh" button in the top right menu in lovelace mode yaml
• ?hide _unused _entities to hide the "Unused Entities" button in the top right menu in lovelace mode yaml
• ?hide_reload _resources at the "Reload Resources" button in the top right menu in lovelace mode yaml
• Block _mouse completely block the mouse