Canon PowerShot SX400 IS Black Manual (en)

Helpful Shooting Features
Displaying Grid Lines
 Still Images 
Grid lines can be displayed on the screen for vertical and 
horizontal reference while shooting.
Press the [
] button, 
choose [Grid Lines] on the 
] tab, and then choose [On] 
Once the setting is complete, grid 
lines are displayed on the screen.
To restore the original setting, 
repeat this process but choose 
Grid lines are not recorded in your shots.