This is page 3 of 4. "Lasso Tool" begins here.
Generally speaking, if you make a mistake, keep moving. Finish up what you are doing and return later to repair the mistake.
Once you have traced a given section of outline, merely move outside the selected area and double click. Photoshop Lasso Tool will automatically draw a straight line from there back to the starting point.
The only trick to this is it has to be “line of sight” so to speak in order to not cut across the subject, or the excess area, as it returns to your start point. If it cuts across either, it will dissect your subject/selection area, and cause some havoc.
Not to worry though. All you have to do is simultaneously hit the “control” button and the letter “z” on your keyboard. This will undo your last step. You will, however lose the change you just made and you will have to remake that change.
Any time you do something you don’t like you can merely hit “control, z” and revert the picture to what it was. That is so cool! You can undo as many as about 20 steps, one at a time. What this means to you is that you never have to worry about fluppin’ duck! You can fix it! Cool, huh!?
For those interested
This little guy is "Flup duck."☺
OK, back to serious business here.
The next area in need of the Photoshop lasso Tool repair is on my windshield pillar.
This time it is the opposite. It is less than I wanted in the selection. I need to add some. So, once again I go to the top of Photoshop. This time I click on “Add to Selection.”
Before I was subtracting from the selection, so I started outside the selection. Now I’m adding to the selection. I will start inside the selection. Then carefully click as I trace what it should be.
At the end I double click and the lasso closes. You'll notice that each time I make a lasso, it fully encloses the area to be changed. That is key in knowing whether to "add" or "subtract" to/from seleciton.
Once again; TA-DA! It magically changes and perfectly outlines my truck.
I continue like this until I am happy with the entire outline. Once it is outlined the way you like, go to the top of the Photoshop screen. You will see the word "feather" in the tool bar.
I start by changing from 0 to 2 pixels. When you "layer" the section you want, this will feather the edge so it is not sharp and abrupt. If you don't feather it the finish picture will show sharp edges. You will be able to tell that your subject was lifted from the picture.
As always there are exceptions to the rule of feathering. Those you will learn by experimentation.
Next, move your cursor back inside the selection area. Right click your little mouse. Up pops this window.
For this particular picture I “Layer via Copy.” There are times you will want to “Layer via Cut”, but that is something we will have to touch on at a different time. You can layer via cut if you like, just to see what happens. Then you can always revert it by hitting “control-z.”
Finish reading "Lasso Tool" here.