Dynamic Field Value
You can set Dynamic Default Value for Fields by using Dynamic Tags.
Edit Field > Settings > Default Value
1. Current Date Time
{{current_date_time}}
You can custom date format like this {{current_date_time | date_format:Y-m-d H:i:s}}
2. Current Request (POST, GET)
E.g You want to get parameter value from url https://piotnetforms.com/?utm_source=facebook
{{request | parameter:utm_source}}
3. Current User Info
{{user_info | meta:ID}}
{{user_info | meta:user_login}}
{{user_info | meta:user_nicename}}
{{user_info | meta:user_email}}
{{user_info | meta:user_url}}
{{user_info | meta:user_registered}}
{{user_info | meta:user_status}}
{{user_info | meta:display_name}}
{{user_info | meta:custom_user_meta}}
4. Current Post / Page
{{post_id}}
{{post_title}}
{{post_url}}
5. Shortcode
{{shortcode | shortcode:[your_shortcode]}}