3. Be sure you have a 5 pixel Brush selected (how to do this was covered in Step 6); when it comes time to ink our paths, Photoshop will draw them with this tool and make the same kind of lines we made when we free-hand inked
4. Select the Pen tool
5. Go up to the Tool options bar, and look at the left side where you see this...
   
   we need to make sure the correct tools are activated (you should be using the same ones that are activated in the graphic above) or the changes we will be making to our graphic in the following steps will not work
6. We want to make a path, so in the left set of three buttons select the middle icon (called Paths) - its the one in the graphic above with the little tiny pen over the square with little boxes at each corner
   THIS IS VERY IMPORTANT - IF YOU DO NOT SELECT PATHS ALL KINDS OF STRANGE THINGS WILL HAPPEN, SO FOLLOW THESE DIRECTIONS CAREFULLY!!!
   Make sure you DO NOT have the left button selected which is the Shape layers button; if you do start drawing using the Shape layers button you may notice that your layers palette now looks something like this:
   
   if this is what you now have congratulations, you did it WRONG; you're only option now is to delete the shape layers you have created and actually follow the directions above to do it correctly
7. To the right of the path selection buttons, on the other side of the vertical line in the graphic on direction 5 above, make sure the regular Pen Tool is selected
   AGAIN THIS IS VERY IMPORTANT - YOU WANT THE PEN TOOL AND NOT THE FREEFORM PEN TOOL OR ANY OF THE OTHERS TO BE SELECTED

8. If you skipped it, read the black paragraph above as it contains important information you need to know about the Pen tool
9. Click the point in the sketch were the towel intersects his shoulder as in the graphic on the top at left
10. As you click, hold down the mouse button and drag it a little ways to the right to get the direction line to display then release the mouse button (if you don't get the direction line it will be difficult to create nice, smooth lines)
11. Move down his arm to the spot at which the sketch makes a major change, which in our sketch is the top of his shoulder where it curves and begins to head down his arm
12. Click at this point and repeat the procedure in direction 2 above to get the direction lines to display
13. Note that at this point you can move the mouse up and down or left and right to get the line that Photoshop inserted between the two points you clicked to curve how you like it - make sure the cure matches the curves in the sketch
14. Create a third point by repeating the procedure in the spot indicated in the graphic on the left

In the graphic at left you can see the three points we are going to use to create our first line have been created. This is a difficult concept for some users to master, so don't worry too much if you have a hard time getting it to work correctly. Keep practicing and it will work. Using a Path means you will have very clean, very neat lines.

Once all the anchors of the line you want to create are in place, you can go back and fine-tune them. Keep in mind that your Path should NOT attempt to outline or draw too much of the image, as this will likely result in problems. Keep your pathing to easy lines you can work with. Let's fine-tune some points...

15. Click the Direct Selector Tool
16. Zoom in so you can see the points and some of the area around it - keep in mind that you will want to see at least some of the surrounding area as this will help you when setting up your lines and curves
17. When attempting to select a point, Photoshop may select the entire path when you first click on a point; you can correct this by clicking a little distance away from a point and drag to draw a selection box around it
18. You should now be able to move the anchor and both the ingoing and outgoing curve vectors (those lines coming off the point in each direction) - this method of curves is very flexible, so take your time and make sure your curve is perfect
19. Click the Menu button on the Paths palette (the little black arrow in the upper-right hand corner) or simply right-click in your image
20. Click Stroke Path...
21. The Stroke Path window will open
22. Make sure that the Tool selected in this window is Brush, and Simulate Pressure is NOT checked
23. Click OK

The Stroke Path command should have just inked the path you were working on. You can now get rid of the path (either by selecting all the anchors and hitting the Delete key, or more simply by selecting Delete Path from the Path menu, or right clicking and choosing Delete Path). We are now ready to path ink the rest of her arm.

24. Create a path for the remainder of his arm (see graphic at left)

Sometimes you'll have a long line that's broken by something in front of it. If you take a look at the sketch you will notice that parts of her chest are obscured by her jacket. For situations like these, it is easy to ink all the lines, then go back later and delete the parts that are covered.

Keep in mind that while the Pen tool is good for the long, important lines, it should not be used for every line in the picture! It could be, but if your pictures have many small lines like this one, you would simply be driven insane. These small lines don't need the detail of the longer ones, so you would be better off drawing them freehand with the mouse.

If you intend to do much more of this type of image work, it is in your best interest to buy a drawing tablet so more of the lines can be done freehand. Even with a tablet though, you will find yourself coming back to the Pen tool when confronted with long, unbroken lines.

25. Continue using the Pen tool to ink the rest of Catgirl
26. Use the Eraser tool to taper the ends of your lines

When you finish this step, Catgirl's entire body should be inked.