Solution
When focus is achieved, the AF point will be displayed in black. Under low-light conditions, the viewfinder will flash in red to illuminate the AF point.
In the <P / Tv / Av / M / B> shooting modes, you can make illumination settings for the AF points and grid in the viewfinder.
1. Set the camera`s power switch to <ON>.
2. Set the Mode Dial to < P / Tv / Av / M / B>.
3. Press the <MENU> button to display the menu screen.
4. Press the <

> button and select the [

] tab.
5. Turn the <

> dial to select the [

] tab.
6. Turn the <

> dial to select [VF display illumination], then press <

>.
7. Turn the <

> dial to select [Auto / On / Off] and press <

>.
AUTO: Auto |
The AF points automatically light up in red under low light. |
ON: Enable |
The AF points light up in red regardless of the ambient light level. |
OFF: Disable |
The AF points do not light up in red. |
With [Auto] or [Enable] set, you can set whether the AF point is to be light up in red (blink) when you press the <

> button during AI Servo AF.
OFF: Non illuminated |
The AF point will not light up during AI Servo AF. |
ON: Illuminated |
AF points used for focusing light up in red during AI Servo AF.
This will not work if [VF display illumination] is set to [Disable]. |
NOTE
- When you press the <
> button, the AF points will light up in red regardless of this setting.
- The electronic level and grid in the viewfinder and the information set with [
: Viewfinder display] > [Show/hide in viewfinder] will also light up in red.