How Downsampling Works
Downsampling is the process of changing the resolution of any image from its placed size in a document to 72 dpi. This can dramatically decrease the size of a bitmap image, and it's an option that is enabled by default in Acrobat Distiller.
The drawback to downsampling is that when a document is viewed larger than 100%, the image will appear blocky and pixelated.
To turn off downsampling in Acrobat Distiller:
-
Choose Job Options from the Settings menu (Figure 5).
Choose Job Options from the Settings menu.
-
Click on the Compression tab in the Job Options dialog box.
-
Uncheck the Average Downsampling at checkboxes (Figure 6).
Click on the Compression tab and uncheck the Average Downsampling at checkboxes.
-
Click the OK button.
){kind=link}
){kind=link}
To turn on downsampling in Acrobat Distiller:
-
Choose Job Options from the Settings menu.
-
Click on the Compression tab in the Job Options dialog box.
-
Check the Average Downsampling at checkboxes and enter the dpi for each image (usually 72 dpi) (Figure 7).
Click on the Compression tab, check the Average Downsampling at checkboxes, and enter the dpi for downsampling.
-
Click the OK button.
){kind=link}