# Measuring tools | Tool | How it works | | ---------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Eyedropper | Click to select a color and makes it the foreground color. | | 3D Material Eyedropper | Click to selects Materials when working in 3D Workspace. | | Color Sampler | Click to select mutliple colors in an image. Selected color values appear in Info panel. | | Ruler | Click and drag to measure distance between two points on image. Measurement appears in Info panel. | | Note | Click to add annotation to image. Notes are do not appear on image when printed. | | Count | Click to add numeric points that count objects in an image. Create multiple Count Groups to count mutliple sets of objects. Click Clear in Options bar to remove points from image. | --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://jjloomis.gitbook.io/adobe-photoshop-basics-windows-edition/working-with-tools/measuring-tools.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.