I saw the updates to my original question.
I am running Toad 12.9.0.71 ( I know there is an update available.)
The "Enable Merge" option does not meet the need.
If I have a 1000 line procedure, and someone adds 20 lines of code that is similar enough to the code around it, I need to be able to link the lines together to align the rest of the code to see if they changed anything else.
Additionally, if sections of code were added in a different order, by linking the beginning of matching sections together, I can verify the section is identical.
Finally, If I have two procedures I need to “merge” together, I need to be able to select sections of code from the left pain and sections from the right pain, and have them appended to each other.
-Dan P.