Field code
%{issue.cfnnnnn}
Read text
Read number
ID field code
%{issue.cfnnnnn.id}
Write
Field code
{issue.cfnnnnn.id}
Field code
issue?.customfield_nnnnn?.name
Read text
Read number
ID field code
issue?.customfield_nnnnn?.id
Write
Field code
issue?.customfield_nnnnn?.id