The User Interface (UI) and HUD can be toggled on/off to take uninterrupted screenshots and videos. This is bound to the Home key by default. If pressing Home isn't restoring the HUD it may have been accidentally changed in the Controls menu. To fix this:
- Restart the game to make the UI visible again
- Click Configuration in the main menu
- Select Controls
- Scroll down to the Interface section
- Find the Toggle HUD binding to determine which key to press
Note: UIs created by plugins and mods are still visible when the vanilla HUD is turned off because they exist outside of the base game's UI systems.