When you configure a catalog, be considerate of site visitors by minimizing the time it takes for the images to download. Image quality and size both affect download time. You can use the output settings in the E-Commerce Catalog Properties Editor and the file size information on the properties palette to keep track of and adjust download time while maintaining image quality.
To control the image format:
In Page view, display the list page or a detail page of the catalog you want to work with.
Open the E-Commerce Catalog Properties Editor.
Display the Products tab.
The output settings for detail images and thumbnail images are separate.
Click the Thumbnail Image tab or Detail Image tab at the bottom of the Products tab.

On these tabs you set the quality of the thumbnail and detail images for the selected product. As you make changes, NetObjects Fusion displays the approximate download time for the file.
You may choose to save and apply previously defined settings. See Saving Output Settings.
Select the File type.
Most photos will be JPEG format.
Set the Quality and Percent.
These fields both affect image quality. 100% is the highest quality, 0% the lowest quality.
a. Set the Quality field first. Each setting corresponds to a range of percents. Low corresponds to 0-39%, Medium to 40-75%, High to 76-99%, and Maximum to 100%.
b. Use the Percent field to fine-tune the quality setting.
As you adjust the settings, the image in the Preview field changes. If the Preview image is scaled down, you can close the editor and check image quality in Page Design view.
Select a download speed.
The most common download time is 56.6.
To apply these settings to all the product images, click Apply to All.
This affects all thumbnail images or all detail images, depending on the selected tab.
Set image rotation. This setting affects only the selected image.
To control the image sizes:
In Page view, display the List page or a detail page of the catalog you want to work with.
Select a thumbnail or detail image.
Notice the image size on the properties palette.
If you selected a thumbnail image, you can choose to see the size of the current image or of all thumbnail images.
Resize the image. See Resizing Product Images.
As you resize, the Properties palette shows the effect on the file size.