How I can add placeholder in my input/textarea fields?
Cognito Forms does not currently allow you to specify a HTML placeholder for text fields. However, you can specify a default value that will appear as a prompt for users that they can later replace.
The following shows how you would specify a default value for a text field.
If you need a required field and want to utilize Jamie's recommendation, you could use the "Show Custom Error" feature to show a custom error message and prevent the form from being submitted. Below is an example:
You would then get an error when you try to submit the form and the text was not modified from "Placeholder text.".