Colours for irregularities

Question

Hi there, I am a little confused as there appears to be inconsistencies in the colouring of letters which are irregular in the verb tables.
In this table only the Z is red, I understand that the letter Z is the main focus of the lesson, however almost all of this verb is irregular, and only highlighting the Z makes me question myself.
In other lessons I have seen emphasis with both red and blue, but there doesn't appear to be a regular pattern, which also casts doubt on my learning.
I know it may be a big job, but would it be possible to devise a standard practice, and then implement? Maybe a job for a Spanish intern :-)

Answer

Hola Paul,
the reason why we didn't highlight any more is because this verb belongs to a group of verbs that share a set of irregular endings and also have an irregular stem; we would have to highlight the whole conjugation, if you know what I mean. The link to the explanation about this specific group of verbs is given at the end of the lesson to help understand these changes.
However I took note about the consistency in the highlighting to share it with the team. I hope this helps.
Saludos
Inma