Format and colour

[colinito]

Hello Everyone,
I keep a monthly account on a Word document of certain regular financial movements.
The details have a different colour for each month.
Entering a certain amount for this month, a line has appeared beneath the words and figures and at the right end of the line is a box in the margin, which has just appeared, with "With Format: Colour of Font: and the colour 'Blue' is written. [Con formato: color de fuente: Azul]
(I have the programme in Spanish as the laptop was bought in Spain and the MS Office is totally in Spanish!)
Also, one of the letters is showing in a different colour to the rest of the line and cannot be altered.


I have tried to cancel and alter this but do not seem able to find a way to do so.
Any advice would be gratefully received.

Regards

Colin