How to export to pdf from indesign retaining existing image compression?
I have a document with images. I need the best quality/size ratio. Now I use the "save for web" feature from photoshop because it allows exactly that.
When I place my images in indesign it looks great, and I sure know my images are small, but when I export I can't seem to choose "retain existing compression", so it wants to recode my already lossy png/jpg's to jpg again which really isn't helpful.
You can use the standard File -> Export function in InDesign, where you have a selection of predefined export presets (it seems like you need something like High Quality Print), which can also be customized.
The best pre-defined presets are High Quality Print and Press Quality, although they also downsample standard images.
You might also want to uncheck the "Optimise for Fast Web View" box.
Furthermore, you can disable downsampling for images from the Compression tab.
For all the details, see: http://helpx.adobe.com/indesign/using/exporting-publishing-pdf.html