This sets the PDF presets for a high quality print file. If you’re making an ebook, it’s a whole different story obviously (interactive stuff like bookmarks and links, smaller images etc).
Go to File > Adobe PDF Presets > Define (文件>Adobe PDF 预设 > 定义).
Click on the New (新建) button on the right.
Give your preset a name.
In Standard (标准) pull down menu you can choose PDF/X-4:2010 which automatically changes the compatibility to Acrobat 7. I haven’t come across a print company in China that didn’t use this standard, and if they do you might want to think about trying somewhere else. If you do need to drop it to PDF/X-1a:2001 remember to select the High Resolution Transparency Flattener Preset (透明度拼合预设) in the Advanced (高级) tab to make sure your type and vectors come out sharp.
In the General (常见) tab choose All (全部) pages as Spreads (跨页). No other box needs to be ticked.
In the Compression tab everything should be set already – it should reduce all images to 300dpi at maximum quality. I change the format to Jpeg 2000 instead of the default jpeg, as Jpeg 2000 is lossless (you don’t lose any information, jpg is a “lossy” format).
In Marks and Bleeds (标记和出血) I just select Crop Marks (裁切标记) (if you choose Bleed Marks (出血标记) the PDF will include crop marks to the edge of the document including bleed).
Make sure the Type (类型) drop down menu is on Default (默认). For Bleed and Slug (出血和辅助信息区), tick the Use Document Bleed Settings (使用文档出血设置) box.
Output (输出) can be left on the default, which uses the document’s colour settings.
And that’s it! Your new preset should be in the presets menu, automatically saved. When you want to save as pdf, choose the preset you just saved from the File > Adobe PDF Presets list (if you choose PDF from the Export (导出) from the File menu, it won’t use a preset).