How to write a dynamic pattern

Hello,

when writing abap code there is the possibility of creating your own pattern for code blocks you need regularly e.g. for documentation or tracing code.

(when editing a program in SE80 -> Utilities -> More utilities -> Edit pattern -> Create pattern)

When creating a pattern there is a menu entry Pattern -> Dynamic pattern. I thought that this allows me to write patterns which use variables e.g. for the current user or date. When choosing the entry the statement *$&$EXIT is added in the pattern but there is no documentation what I have to do.

Has anyone experience in creating dynamic pattern who can help me or knows where I can find documentation on this topic?

Thanks

Roman