Canon A3400 IS 6186B011 User Manual (en)

No AF frames are displayed and the camera does not focus when the shutter 
button is pressed halfway.
To have AF frames displayed and the camera focus correctly, try composing the shot 
with higher-contrast subject areas centered before you press the shutter button 
halfway. Otherwise, try pressing the shutter button halfway repeatedly.
Subjects in shots look too dark.
Set the flash mode to 
Adjust brightness by using exposure compensation (p. 90).
Adjust contrast by using i-Contrast (pp. 94, 125).
Subjects look too bright, highlights are washed-out.
Set the flash mode to 
Adjust brightness by using exposure compensation (p. 90).
Reduce the lighting on subjects.
Shots look too dark despite the flash firing (p. 56).
Shoot within flash range (see “Specifications” (p. 38)).
Subjects in flash shots look too bright, highlights are washed-out.
Shoot within flash range (see “Specifications” (p. 38)).
Set the flash mode to 
White dots or similar image artifacts appear in flash shots.
This is caused by light from the flash reflecting off dust or airborne particles.
Shots look grainy.
Lower the ISO speed (p. 93).
High ISO speeds in some shooting modes may cause grainy images (p. 93).
Subjects are affected by red-eye (p. 69).
Set [Lamp Setting] to [On] (p. 72) to activate the red-eye reduction lamp (p. 4) in flash 
shots. Note that while the red-eye reduction lamp is on (for about one second), it is not 
possible to shoot, because the lamp is counteracting red-eye. For best results, have 
subjects look at the red-eye reduction lamp. Also try increasing the lighting in indoor 
scenes and shooting at closer range.
Edit images using red-eye correction (p. 126).
Recording to the memory card takes too long, or continuous shooting is 
Use the camera to perform low-level formatting of the memory card (p. 133).
Shooting settings or FUNC. menu settings are not available.
Available setting items vary by shooting mode. Refer to “Functions Available in Each 
Shooting Mode”, “FUNC. Menu”, and “Shooting Menu” (pp. 172 – 179).