BPMon issue on Solman 7.2

Hi,

We are using Solman 7.2 SP06. We are trying to customize alert message generated in Trans SOLDOC->alert handling->change custom description.

There are 2 questions which I have

1. I am able to add using "Insert URL" to include a URL in the text and it works. But I am not able to understand the process of how it works?

2. I am not able to use "Insert Symbols" to insert in the text like system name, client number, host name...the mail output does not replace the variables and they appear as it is in the mail.