A de-facto GUI standard is to indicate that particular fields are mandatory, and a common question is to how to do something similar in Genero screens, as a developers first instinct is to look for a “mandatory” attribute.
In this article, I illustrate a number of techniques you can use to automatically indicate if a field is mandatory such as adding an asterix, changing background colour, adding a placeholder, and discusses strengths and weaknesses of each approach.
Read more at
https://4js.com/ask-reuben/ig-34/