I want to extend the usage of ELOG and have 2 Questions:

1. Is it possible to have Fields which only appears if another selection is done? e.g. I create a new entry. This new entry has a type field. If I chose the Type "ABC" another field appears where the departemnt could be choosen. If I select Type "DEF" the Department field does not appear.

2. I have a field Status. This is a predefined field with 3 entries (New,  under progress, closed). If i change the status field time, date old and new status should be logged or written in the text field. I can log this with the answer field with a new ID. But is there any other way to log it in the text field or log it with no new ID? 

Can i implement the wishes above? If yes how does it work?

Thanks for your help

Michael