Baerbel,
This should work.
In Designer, maybe you could verify this?
1) Highlight the table in question (ex: cr) the title bar of that table now becomes blue
2) There’s a scroll bar that should appear now
3) Scroll down/up and see if the attribute alias shows up now?
Is your universe using connect to the SDM server as the server where attribute aliases were created? Or is it using an offline reporting instance of SDM?
_R