Previewing patterns
The Pattern Maker dialog box provides tools and options for previewing generated patterns. You can magnify and navigate in the preview image just as you do in the Photoshop document window. You can also show or hide tile boundaries and switch between previewing the original image and the generated pattern.
To magnify and reduce the preview image:
- Select the Zoom tool
in the Pattern Maker dialog box. - Click in the preview image to zoom in, or hold down Alt (Windows) or Option (Mac OS), and click in the preview image to zoom out.
The magnification level appears at the bottom of the dialog box.
To navigate in the preview image:
Select the Hand tool 
in the Pattern Maker dialog box, and drag in the preview image. Alternately, hold down the spacebar, and drag in the preview image.
To display tile boundaries in the preview image:
Select Tile Boundaries in the Preview section of the Pattern Maker dialog box. To choose a different color for tile boundaries, click the color swatch.
To switch between the generated pattern and the original image:
Choose an option from the Show pop-up menu in the Preview section of the Pattern Maker dialog box.
When previewing the original image, you change the sample area using the Rectangular Marquee tool. The new sample will be used for the next generation.