Mike, thanks for the follow-up and it appears that I missed one important step before the Pull/Push process and that is using rectangle tool. Mind you, I can't hear the video and not familiar with shortcut tool just yet. But I have successfully created my own timber joint.

Now I have few questions- I see Clark Bemer TF Rubies Peg Hole video tutorial. In the video, I can see that after creating the joint, proceed to create peg holes but after I create peg holes, what do I do afterward? I mean how do I save it and all. It would be nice that I can create a joint with holes in it so it will be less work for me down the road when designing a project. Also, another question is what is the rule thumb of putting peg hole in right spot?