Hi I am currently using version 16.5 and cannot seem to find the menu to customize the alias (I recall seeing this function)
Could someone put me out in the general direction?Thanks in advance!
I cannot honestly say that I've ever noticed a menu item to customize aliases or function key mappings. You can see the current mappings using the Tools -> Utilities -> Aliases / Function Keys... command.
For defining aliases, I always add them to my env file in my pcbenv (or at the site level, if I want them accessible to all the users sharing my site environment).