A “Precise Cursor” is a crosshairs that can be used in lieu of any of Photoshop’s brush tools, brush-based tools or other tools such as the Eyedropper. Using a Precise cursor is helpful when it’s important to start a brush stroke at a specific point on an image.

To set brush tools or other tools to use Precise cursors, go to Photoshop->Preferences->Display & Cursors, and select Precise in the Painting Cursors or Other Cursors areas. Photoshop CS2 also allows painting cursors to use a normal and Precise cursor simultaneously: check “Show Crosshair In Brush Tip” to activate this feature.