SAP login screen message

Hi experts,

How we can find the edit mode in SE61 to change the document type to general text?

This is required to customize sap logon screen message in my system, recommended by sap in note#205487

My DEV system is open for the changes but i am not able find edit the document type.

And one more query: Can we create a link instead of text message in these logon screen

Regards

Nick Loy