Canon T 90 - Manual (Page 26)

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6. The camera sets the first
usable frame automatically.
1) As soon as the back cover is
closed, the camera will advance
the film automatically until the
frame counter on the display
panel indicates “1”. (If the film has
not been correctly advanced, the
whole film transport bars blink to
warn you.)
2) When using DX-coded film, the
film speed is automatically set
and it appears on the display
panel while the camera is advanc­
ing the film.