Using Pattern Maker

1. Open Photoshop. You need to open an image from which you will be creating pattern.

photoshop patterns main image

2. Filter > Pattern Maker

3. This will open Pattern Maker dialogue box with the Rectangular Marquee Tool selected by default.

photoshop patterns selection

4. Drag Rectangular Marquee Tool on the portion of the image from which you want to create the pattern. (marked with white circle)

5. Click Generate.

6. This will create the pattern which has to be saved.

7. At the right bottom of the dialogue box you will find "Tile History".

8. Select "Saves Preset Pattern" (marked with green circle)

9. Click Cancel to close the window.

photoshop patterns saving  pattern

10. We will use the pattern now.

File > New

Go for any size of the file with RGB mode on.

11. Edit > Fill > Use (Pattern)

Open newly created pattern from the custom pattern flyout menu. Click OK.

This will fill canvas with the pattern.

photoshop patterns

Examples of patterns created from the above image using Pattern Maker
photoshop patterns photoshop patterns photoshop patterns