Many of the topics that cover PDF customization were written before PDF themes landed in DITA-OT 4.0. For simple customizations, themes may be a better solution, so related topics should be updated to mention themes, including: - https://www.dita-ot.org/dev/topics/pdf-customization-plugins - https://www.dita-ot.org/dev/topics/pdf-customization - https://www.dita-ot.org/dev/topics/pdf-customization-approaches
Many of the topics that cover PDF customization were written before PDF themes landed in DITA-OT 4.0.
For simple customizations, themes may be a better solution, so related topics should be updated to mention themes, including: