Issue Description

We currently have multiple documents describing various ways to access a custom field using smart values:
https://support.atlassian.com/jira-software-cloud/docs/find-the-smart-value-for-a-field/
https://support.atlassian.com/jira-software-cloud/docs/use-smart-values-to-access-listed-values/
https://support.atlassian.com/jira-software-cloud/docs/what-are-smart-values/

However, the methods provided in these documents differ, and also do not include all the ways the custom fields can be accessed. This can lead to confusion and make it difficult to figure out the best way to access a custom field's value in a given use case.

For example:

• One documentation says that the following smart value can be used:

  {{issue.My custom field name}}
  

• Another documentation says that the following smart value can be used (assuming that the custom field ID is 11000)

  {{customfield_11000.value}}
  

In fact, there are many ways to access the same custom field:

{{issue.fields.customfield_11000}}
{{customfield_11000}}
{{issue.customfield_11000}}
{{issue.My Custom Field Name}}

Suggestion

Consolidate all the different ways a custom field can be accessed into one single documentation, in order to avoid confusion.