Let's start on Basic Techniques.
Create a Rectangle object.
When you Select it, you can scale it vertically.
Scale it horizontally.
Or Scale it horizontally and vertically at the same time. (hold the CTRL key to maintain proportion)
Still Selected if you Left-Click on it again, you'll get a new set of arrows surrounding it.
With these new set of arrows, you can Rotate the object.
Hold the CTRL key while rotating to move it in degrees of 15 at a time.
Here I Rotateed it 90 degrees clockwise.
With the same set of arrows, you can also Stretch the rectangle.
When you have your Rotation arrows, you'll be able to see a Crosshair in the center.
This crosshair is the Center-Point of the object.
You can Left-Click it and drag it around.
When you Rotate an object, it will rotate around the center-point.
At the top near the Menu, you'll see options for rotating.
Clicking this button rotates 90 degrees counter-clockwise.
Clicking this one rotates 90 degrees clockwise.
You can use these for Faster rotating.
You can use 'CTRL' + 'C' to Copy.
As well as 'CTRL' + 'V' to Paste your creations.
You can also Duplicate using 'CTRL' + 'D'.
Then you can hold CTRL while dragging the duplicate to maintain a horizontal or vertical axis with the original object. This helps for Mirroring.
At the top, you'll see a Flip Horizontally button.
If we do this with a Duplicate we can create a mirror for the 2 objects.
If we were to Duplicate again and hold CTRL while dragging it downwards...
...we could then use the Flip Vertically button...
...to create another Mirror of the objects!
Let's create 3 Circles of different colors.
Lay them ontop of each other like so.
Select the top Circle
Selecting the middle circle might be a challenge.
An easy way to accomplish this is to hold the ALT key while Left-Clicking again to select the object underneath your currently selected object.
You can continue to do this type of Selection for the last Circle too.
Now go back and Select the top circle.
With it Selected go to Object -> Lower to Bottom.
When you do this you'll see it Underneath the middle circle.
If we move it a bit, we can actually see it's below both circles. Use this to send Objects to the very bottom of the shape hierarchy.
Undo the changes ('CTRL' + 'Z'), and re-select the top circle.
Click on Object -> Lower.
You'll notice the Circle went down by only one.
Now Select the bottom circle. (use ALT if needed)
Click on Object -> Raise to Top.
You'll see it's now highest in the Hierarchy of the circles.
Select the bottom Circle again.
Click on Object -> Raise.
The bottom circle will now be in the Middle!
(This tutorial may continue to be updated!)