As you saw in the video, the proportional tool can be turned on and off with your mouse, by clicking on the switch icon for the tool. If you prefer to use your keyboard, press the “o” key, to turn it on and off.
Once you have turned it on, and selected an ‘edge’ or a ‘face’, you’ll notice that a circle will show on the screen around the area you wish to make changes to. This circle is called the “circle of influence”, and the amount of influence you apply can be changed with your mouse wheel, which will adjust the size of the circle.
You can make changes to any of the three modeling objects, “edges, faces and vertexes”. I suggest that you spend some time with basic models, and try several of the types of proportional editing structures to find the best that will match the design you are working on.
Have fun, and don’t forget to check out parts one and two!
Great work. Thank you!