> For the complete documentation index, see [llms.txt](https://help.payorcrm.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.payorcrm.com/setting-up-invoice-reminders/creating-rules.md). # Rule creator UI The rule creator UI allows advanced rules to be created based on business need .The below guide will help users create advanced rules The below screenshot shows the UI of the rule creator view ![](/files/-LNq7IS-Q-LAsBgEnrc3) **AND / OR operator (1)** - The 'AND' , 'OR" operator defines whether you want the rules to be AND'ed or OR'ed **Add Rule / Add Group (2)** Add rule - Adds a single rule ( for eg: Invoice overdue by 10 days) Add group - Allows you to add a rule group containing multiple rules within **A Single Rule (3)** - A single mathematical rule ( for e.g. Amount > 100 ) Item 3 shows an example of a rule added in the rule creator ( invoice amount greater than 1000) **A Rule group (4)** Item 4 shows an example of rule group ( invoice due in 5 days OR Invoice overdue by 10 days ) ### --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://help.payorcrm.com/setting-up-invoice-reminders/creating-rules.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.