Document basic keyboard shortcuts for accessibility in more places
From #18989 (closed):
While we were doing our keyboard and screen reader testing, we had to try different combination of shortcuts and try to study and understand the current shortcuts defined on the System Tools.
For instance, Alt+Space shortcut opens RESIZE MENU (close, maximize, minimize, etc.) in all windows (options that are not receiving focus with Tab key) but users that do not have previous knowledge of that shortcut may think it is not accessible. The same logic applies with other shortcuts like Alt+Super+S to turn screen reader on or off. Or Ctrl+Alt+Tab for universal access menu.
There is a webpage with Tails accessibility information but it may be a good idea to add some basic shortcuts.
Additional to that, it may be a good idea also to add this information or instructions message on some screen reader accessibility section inside Tails, not only on the documentation webpage. This way the user can have the info on site at the right time.