Specifies the initial value of the javavmargsset option and Advanced Preference. Setting this value allows the embedded JVM of an Arbortext Editor process to be adjusted without using a custom\init\*.acl file. For example, in an Arbortext Publishing Engine environment, APTJAVAVMARGS could be used to adjust the maximum Java heap size for all Arbortext PE sub-processes by setting it in such a way that it is used by the sub-processes.