Having icon selections there so not to double tap

Hi there
I saw a youtube video where the guy had a grade column up with the icons ready to tap for every row for that column with red amber green - saves double tapping etc - how did they do it please?
cheers in advance
A

These are called the custom editors and you will find a detailed explanation here .




Give this iconDrop tool below a chance too (grade book > Tools > iconDrop). It is an interesting alternative.