The User Interface (UI) of FutureOS presents the user with three fixed sections: an icon section (upper half of screen), a file-name display and selection section (lower half of screen) and a message line (bottom). It appears directly after booting FutureOS, but can also be used from applications. The user can browse through directories of discs and hard-disc partitions. The size of the text window is fixed, so 64 different file names can be displayed at once (this equals one complete directory of a data of system formatted disc f.e.) A cursor arrow is used to select devices, functions or files; this cursor arrow can be controlled with nearly all of the pointer based HID devices (joystick, mouse, trackball, light-pen, grafpad) available for the CPC.
Applications do call the UI as a subroutine, and the user can return to the application via the OK button. The icons are fixed, so the layout remains stable throughout its use on every computer.
Files can be viewed on-screen (scroll up and down) or printed. File headers can also be viewed. When typing a text file it is possible to set the number of columns and lines of the window the text is displayed in.