2. I'm currently using Also Know As facts for nicknames. Example: Odelia Vetsch, aka Tillie. In Family Tree Maker 2012, I checked the box "Use AKA if available after the middle name", but this only shows up in the index as: Odelia "Tillie" Vetsch. Is there a way to have her name show like this once a tree is synced online?
Tillie is not an aka, it is a nickname. Many people mix up this value.
AKA is used in general as aliases, working names, pen name etc. A common nickname Jack for John would be displayed with quotes around it. John Wayne is an aka for Marion Mitchell Morrison.
In GEDCOM a tag is available for NICKname, but if I recall FTM does not have this value. I would in FTM enter:
Given: Odelia "Tillie"