MAC Instructions...for use with photo editing programs:

  Option 1—   Photoshop:

      1. Select "File" from top menu...scroll down to "Open"...Select desired reference image. (Or use Command+O)       
      2. Select "File" from top menu...Scroll down to "Place".                    
      3. Select desired measurement card. (Black, Dk Gray or Lt Gray)...click on place (bottom right corner of window).
      4. Enlarge or shrink grid to desired size.

  Option 2—   Download Seashore (free):

      1. Select "File" from top menu...scroll down to "Open"...Select desired reference image. (Or use Command+O).
      2. Select "File" from top menu...Scroll down to "Import".
      3. Select desired measurement card. (Black, Dk Gray or Lt Gray)...click on "Open" (bottom right corner of window).
      4. Press "V" to select position tool...move grid to desired position. Scale grid by dragging with the "Shift" key

  PC Instructions...for use with photo editing programs:

  Option 1—   Photoshop

      (Same as MAC instructions)

  Option 2—  Download Paint.net (free):

      1. Select "File" from top menu...scroll down to "Open"...Select desired reference image. (Or use Control+O).
      2. Find grid file on desktop and drag it onto the photo. Select "Add Layer" from pop up menu.
      3. Press "M" to select position tool...move grid to desired location. Scale grid by dragging with the "Shift" key