Automatic Recording Of Changes To Portal

Hello,

I was wondering if there is anyway to enable a feature similar to "Automatic recording of changes" in the portal so that you can be sure every change is transported or if each modified piece must be manually added to a transport package and you must keep track of every object you modify.

Also, when you add an object to a transport package is it similar to a pointer (or delta link, I suppose), where all the changes you make are updated in the transport package until you export it, or is it simply a copy that must be updated right before you export the package?

Thanks much,

~Mike