You can't do it within GC. You can delete the lap in TC, then export as a tcx file and manually import into GC. Or you can export out of GC as a tcx file, then edit the file with an xml editor, such as firstobject. Then manually import the edited file back to GC.
Any suggestions for an old guy like me that does not have a BS in Computer Science?
Any suggestions for an old guy like me that does not have a BS in Computer Science?
Don't let "digging" the new GC keep you from trying out all the other fitness sites out there. I don't know of any that do everything I want, at least none with the "free" membership, but all of them do certain things very well that the others, including GC do not do well.
And don't try to confuse/compare Garmin Training Center with Garmin Connect. GTC is an application that exists on your computer. Garmin Connect is a web app that exists in "the cloud". Likely two entirely different development teams behind them.