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

GET : {{request | parameter:utm_source}}

POST : {{request_post | 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}}

{{post_time | format:F j, Y}}

{{post_modified_time | format:F j, Y}}

{{post_content | length:0}}

{{post_excerpt | length:50}}

{{post_comments_number}}

{{post_featured_image | size:full}}

{{post_terms | taxonomy:tags | separator:, | link:true}}

5. Shortcode

{{shortcode | shortcode:[your_shortcode]}}

6. Custom Field

{{post_custom_field | name:your_field_name}}

{{acf_field | name:your_field_name}}

{{metabox_field | name:your_field_name}}

{{pods_field | name:your_field_name}}

{{toolset_field | name:your_field_name}}

{{jetengine_field | name:your_field_name}}

7. Author Info

{{author_info | meta:display_name}}

{{author_info | meta:user_nicename}}

{{author_info | meta:user_email}}

{{author_info | meta:description}}

{{author_info | meta:user_meta}}

8. Woocommerce

{{wc_product_title}}

{{wc_product_price | format:full}}

{{wc_product_price | format:original}}

{{wc_product_price | format:sale}}

{{wc_product_discount_percentage}}

{{wc_product_rating}}

{{wc_product_short_description | length:0}}

{{post_terms | taxonomy:product_cat | separator:, | link:true}}

{{post_terms | taxonomy:product_tag | separator:, | link:true}}

{{wc_category_thumbnail}}

9. Archive

{{archive_title}}

{{archive_description | length:0}}

{{archive_meta | term_id:term_id | meta_key:meta_key}}

10. Term

{{term_name}}

{{term_description}}

{{term_url}}

{{term_count}}

{{term_color}}

{{term_image}}

{{term_meta | meta_key:meta_key}}

11. Remote IP

{{remote_ip}}