Corel PaintShop Pro X7, DE User's Guide Page 771

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Creating images for the Web 767
JPEG Optimizer Format
You can determine how an image appears as it is being loaded. You
can optimize the JPEG so that the image downloads one line at a time,
starting from the top.
You can choose to have large images displayed incrementally in several
passes; detail is added with each pass. This option allows the viewer to
see the image as it is being downloaded.
JPEG Optimizer Download Times
You can view the size of the compressed file and estimated download
times for four modem speeds.
Using the JPEG wizard
You can open the JPEG wizard from the JPEG Optimizer dialog box.
This wizard guides you through the steps of optimizing a JPEG file.
To optimize and save a JPEG file
Edit workspace
1 Choose File Export JPEG Optimizer.
The JPEG Optimizer dialog box appears. The preview areas show
the current image on the left and the resulting JPEG file on the
right.
2 Click the Quality tab, and set or type a value in the Set
compression value to control.
3 Choose a color sampling method from the Chroma Subsampling
drop-list if you want to change the default setting.
4 Click the Format tab and choose one of the following options:
Standard — downloads one line a time, starting from the top
Progressive — displays the image incrementally in several
passes, and detail is added each time
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