I suggest you make a copy of the Photoshop file (File > Save As... and rename it) so that you keep your layered file in case you need to go back to the original and make further changes. Then flatten the copy and save it as a Photoshop PDF e.g. [PDF/X-1a:2001].
save as a photoshop pdf or
in indesign... place the image in a frame and then export to pdf
By the way, you should ensure that your A3 PSD document is not more than 300ppi (Image > Image size).
How did you create this PDF and what makes you or the recipient think ID will create a smaller one?
If you’re sending this for print, then I would question the printer. File size should not be an issue.
If it’s just for proofing, then use the PDF optimizer in Acrobat to knock the file size down.
Finally, if you save as PDF from Photoshop WITHOUT the ability to edit that PDF in Photoshop the file size will drop dramatically. Make sure to save as PSD first.
Thanks for all of your suggestions. I think my reasons for moving to indesign were due more to my lack of knowledge than the recipients requests.
I think i need to proivide a little more info to be clear.
The poster is designed in A3 at 300dpi (images are all 300dpi)... but will be downsized to an A4 advertisement in a magazine.. and upsized to an A2 poster for promotion of the event.
It is my understanding that it would be best to keep all text and logos as vector objects so they maintain their sharpness when upsized. I have also converted all text to shape layers before saving the pdf from photoshop.
I guess my question was as much about what would be the best way to do it in the future, as it was about solving my current problem..
Any further tips or advise would be welcome.
I have managed to get the file size down to 33mb using your suggestions... thanks