Firstly, open the .pub document. From the File menu select Pack and Go, then select Take to a Commercial Printing Service. This option will allow you to include linked graphics, embed true-type fonts, create linked graphics from embedded fonts, or list fonts that cannot be embedded. After that, press Next, click Browse, and select a directory on your computer to save the file. Press OK, then Next, check the embed true-type fonts box, and once again click Next. Once the process is complete, press Finish.