Step 1: An Example Image
Then draw a smaller rectangle inside it.
Then draw two smaller rectangles inside that rectangle
Step 2: Copy and Paste the Image
Step 3: Select and Shift Objects
Shift it inward to the left using arrow keys if available.
Shift the bottom smaller rectangle outward to the right.
Step 4: View the Image
The top smaller rectangle should appear to be outward.
the bottom smaller rectangle should appear to be inward.
Step 5: Some Images Are Convenient
The 3D viewing is easiest when the width of one picture equals the distance between the eyes. Sometimes a picture may need to be scaled in size to do this.