If you find your cursor inexplicably changes from Brush shape to crosshairs or vice versa, you probably accidentally pressed the Caps Lock key. Press it again. to change

Tools With Precise Settings

A precise cursor is available for many of Photoshop CC’s brush tools, brush-based tools or other tools. Using a precise cursor is helpful when it’s important to start a brush stroke at a specific point on an image or to sample a single pixel’s color values. Tools that have precise cursor capabilities include:

EyedropperHealing brushesPatch ToolRed EyeBrushesRubber StampDodge, Burn and Sponge 

If you switch the Eyedropper tool to a precise cursor, be sure to check the Sample Size in the Tool Options. Unless you are looking for a single pixel, you don’t want a Point Sample. The reason is that sample will be the exact color of the single pixel that is being sampled—you may not be choosing the color you want. Instead, choose either the 3 by 3 Average or 5 by 5 Average sample sizes. This tells Photoshop to look at the three or five pixels surrounding the sample point and calculate the average of all the color values for the pixels in the sample.

Changing Precise Cursor Settings

If your workflow is such that you need total precision all the time, you can set the Photoshop Preferences to use only precise cursors. Here’s how: If you want to go back to the original cursors, simply follow the instructions above and select Standard.