Ability to choose alias from a group specific drop down list

I am EXTREMELY sorry. My brain must have frozen.

My question was about tags, not aliases.

If you have the patience:

• can I see a dropdown list of all tags so I can scroll down the list if I forget a tag name ?. It must be possible because if I just enter a letter like “c”, a drop down list of all tags starting with C appears
• the list of tags is much too long to scroll down even for one letter. I would like to limit the list of tags to only those tags used in the group which the smart group searches.

once again very sorry.