Set the Brush to 1pt and draw a straight path with Pen tool. Right-click on the path and select Stroke Path. Select Brush, uncheck Simulate Pressure and you will get a line like the top example.
Select the Brush tool and open up Brushes palette located at top right of Options bar. Check on Shape Dynamics and enter the settings shown in the diagram. Close the palette once you are done.
Set Brush size to 3pt and draw a straight path with Pen tool. Right-click on the path and select Stroke Path. But check on Simulate Pressure this time. You will get a line like the bottom example.
Step 2 – Tracing the Figure:
Create a new document of size 750×550 pixels. Drag Keeley Hazell image in and create a new layer above and name it as Outline.
Using the technique in Step 1, path the general outline with Pen tool. Set Brush to 1pt and stroke your path without Simulate Pressure.