Convert powerpoint file to high resolution .tif file in Mac

Powerpoint is a powerful tool for making versatile plots for publication, which can be exported as low resolution figure files. Many journals, however, requires high resolution .tif file for publication. Here is how to convert .pptx or .ppt file (in Powerpoint 2011) to .tif file in Mac OS.

1. Convert .ppt file to pdf file:

a.     File -> “Reduce file size” -> In “picture quality” dropdown box, select “Best for Printing (220ppi)” -> click “OK”

b.     File -> Save As -> In “format” dropdown box, select “PDF” -> In “Options” , enter the largest number possible for width and height -> Click “OK” ->  Click “Save”

      2. Convert .pdf file to .tif file. This can be done in two methods.

2-1 .The first method is open .pdf file in Adobe Acrobat Pro, then

a.     File -> Save As -> in “Format” dropdown box, select “TIFF”

b.     Click “Settings” to the right of “Format”. In the dialog box,

                                               i.     select “LZW” for both “Grayscale” and “Color”,

                                             ii.     select “Color:RGB” in “Colorspace”

                                            iii.      in “Resolution” box, select “300 ppi” or higher.

2-2. The second method needs Photoshop.

c.     File→Open the PDF. You will need to do this one page at a time. Make sure you're importing it at 300ppi, RGB.

d.     Use the Crop Tool (fifth from the top of the toolbar) to select an area close to the borders of your image. Hit Enter to apply the crop.

e.     Layer→Flatten Image

f.      Image→Image Size. Uncheck the Resample Image checkbox. If the Width is over 17.35cm, type 17.35 in the Width box (17.35cm is our maximum allowable width for figures). The Resolution will go up automatically as the Width decreases. If the resolution does not hit 300 when you make the Width 17.35, type 300 in Resolution and as long as Width doesn't go below 8.3cm, everything is fine. Also, the height cannot be more than 23.35. If the Height and Width are within these prescribed limits, no adjustment to your figure size needs to be made.

g.     File→Save As. Save as TIFF, Image Compression set to LZW, Pixel Order set to Interleaved, Byte Order set to IBM PC.