Creating a 20 Pixel Grid Master Image

1. Launch Photoshop and open a new document (Command-N)
   
   
2. In the New Document dialog box enter the following information:
   
   
   
   
3. Click OK (or hit Return) and this document opens:
   
   
   
   
4. Select all (Command-A):
   
   
   
   
5. Navigate to Edit > Stroke... and the Stroke dialog box opens
   
   
6. Change the settings to:
   
   
   
   
7. These settings will generate the necessary image for a 20 pixel grid:
   
   
   
   
8. Save your file as 20_px_grid.psd

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