How to present a long form with optional sections

1. How do you indicate something is optional?
2. How to mark optional fields?
3. How to indicate mandatory fields ux?

How do you indicate something is optional?

Add (optional) at the end of the label

The best way to indicate optional is to add the word in parenthesis after the label. It's easy to read and visually connected to the label that it is referring to.

How to mark optional fields?

Many designers tend to mark optional fields by placing “(optional)” after the field label. This approach makes the field label longer and wordier than it really is.

How to indicate mandatory fields ux?

Summary: Using an asterisk to mark required fields is an easy way to improve the usability of your forms. Only marking optional fields makes it difficult for people to fill out the form.