PDF保存するとアートボードのサイズが変わってしまう

apt278  wrote Change the size of the artboard to save PDF Illustrator cc And the next time you open the artboard to pdf store in the form of creating the print shop postcard 100 * 148 The larger 106 * 154 and fills the size of the artboard will become. Save the same again and change the size of the artboard, the repeat. So size doesn't matter to save, rather than actually printing to the print shop to print on a printer of the friend's House so that a reasonable file size is diverted to its specifications. By question -Do not change the size of the artboard you want to and -Print the postcards with photos on a home printer for pdf settings, please tell This is a beginner level, although prima facie the extent. Please inform me thank you.   Translations by Microsoft® Translator

I'm not really sure I understand your question. Are you asking what size to make the artboard for a postcard? Or for several? And you want to print them at home? Will you also be using a print shop?