

This way, if they do need to edit a path, they can Command-click (Ctrl-click) a path to select it at this point, the "Edit selected paths" option lets them draw over it. Many designers prefer to deselect the "Keep selected" option but leave the "Edit selected paths" option selected. This can happen often if you have the "Keep selected" option selected. Where this gets in the way, however, is when you intend to draw a new path but inadvertently end up editing a path that is selected instead. This can be helpful because it allows you to tweak a path to perfection as you are drawing it, almost as if you were using the Smooth tool.

When the "Edit selected paths" option is selected and your pointer is within the specified number of pixels from an existing selected path, Illustrator allows you to modify the selected path by simply drawing over it with the Pencil tool. You can change this behavior by deselecting the "Keep selected" option. With Illustrator's default behavior, when you draw a path with the Pencil tool, the path becomes selected as soon as you complete it.

If you have trouble controlling the mouse or pen precisely, you might benefit from a higher Fidelity setting. If you're good with handling the mouse or if you're using an input pen, you might go with a lower setting. A higher Fidelity setting results in a path that is smoother and less jittery but that may not match your stroke exactly. A lower Fidelity setting results in a path that more closely matches the exact movement of your mouse.

Available for both the Pencil and Smooth tools, the Fidelity setting determines how close the vector path is drawn in relation to the movement of your mouse or input pen. The Pencil Tool Options dialog box offers the following settings: If you trash your preferences file, however, you'll need to reset these preferences to your liking. The preferences for the Pencil and Smooth tools are saved when you quit Illustrator so that you don't have to set these for each new file you create or each time you launch Illustrator.
