Pretty sure you can do it a number of ways.
1-Create an absolute url
2-Create a link to the location of your .pdf with MODX tags:
<a href="[[++site_url]]assets/templates/yourDirectory/yourPDFfile.pdf"
3-Create a custom setting pointing to your location and use MODX tags:
<a href=[[++yourCustomSetting]]yourPDFfile.pdf" />
4-Create a resource, set it for Static Resources, set the pdf file you want, and then call it with a resource ID
I'm still a little fuzzy on calling ID's. The docs show both
which confuses me but I got it to work yesterday by using
href="[[~40? &scheme=`full`]]"
Look here:
http://rtfm.modx.com/display/revolution20/Tag+Syntax
[ed. note: frogabog last edited this post 14 years, 8 months ago.]