7.0

By default the settings are such that the photo will be optimized to a 96dpi (normal screen resolution)
JPEG at the size that it appears on your page. This is normally what you will want for photos in your
website.
You can change the resolution used in this dialog, by either choosing the physical size you want for the
optimized image (width/height in pixels), or by entering a different dpi (eg. perhaps 150dpi if you want
print quality).
If you choose the dpi option the value you enter is remembered and becomes the default just for the
current session. You can also maintain the photo's current resolution by choosing Current from the ppi
list.
You can also choose to optimize as a PNG (produces much larger images, but better quality for graphics
and text images) or change the quality used for JPEG optimization (higher quality means larger JPEG
sizes).
If your photo is cropped, only the visible part of the image is preserved in the optimized image.
For printing, a photo resolution of 150dpi gives very good results, whilst 300 dpi will provide the highest
quality commercial printing (most people cannot tell the difference between 150dpi and 300dpi, but the
300dpi requires four times as much memory or file space).
Note
: The optimum JPEG quality is 75%.WE DO NOT recommend saving JPEGs with a quality at 100% -
they are virtually indistinguishable from JPEGs saved at 75%, but use considerably more memory and file
space.
Warning: "Optimize photo
" is a "destructive" operation. When you save the file the parts of the image removed are lost, and the
resolution changed permanently (you can of course undo the changes while the file is open for editing).
You can optimize multiple photos at once if you want them to all have the same DPI. Select the photos
you want to optimize and then choose the Optimize
operation as described above. If your photos have different dimensions, the option to optimize by pixel
size is disabled and you must just choose the required dpi.
Or you can use the "Utilities" > "Optimize all JPEGs"
facility to optimize all the JPEG photos in your document in one operation. Again in this case the
optimize dialog appears so you can choose the dpi to be used for the optimizations.
Note that after optimizing the original unoptimized and now unreferenced photo remains in the Bitmap
Gallery
. This means it is still in memory and so the memory requirements of your design will not have been
reduced. Simply save your design and reload after optimizing, to eliminate the original large images.
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