Raymarine curser showing going backwards

[bigwow]

The curser on my Raymarine RL70CRC is showing going backward, but in the right direction, how do i turn it round so it faces the direction the boat is going. in truth it has been this way for a while but mu new crew ihas OCD!
Thanks in advance.

 

[TSB240]

Check your fluxgate and or recalibrate.

I appear to be travelling in reverse on plotter!