Stylesheet Development with APP > Introduction to APP in Arbortext Styler > APP Functionality in Arbortext Styler
  
APP Functionality in Arbortext Styler
Access to two aspects of the functionality of the Arbortext Advanced Print Publisher (APP) product is provided in an Arbortext environment:
1. Formatting and publishing: the APP print engine is installed when you install Arbortext Styler or Arbortext Publishing Engine. You may then opt to set APP as the default print engine for your Arbortext environment, for documents that use a specific stylesheet, or for individual documents. When specified, the APP engine will generate any required print or PDF output.
Please see Logic for print/preview print engine selection for information about how to select APP as your default print engine.
2. Stylesheet extension: an Arbortext Styler (.style) stylesheet will support the addition of APP code in order to achieve certain effects not possible through the Arbortext Styler interface.
There are two ways in which the code can be incorporated:
Editing the stylesheet source to add APP code
Associating an APP template (.3f file) with the Arbortext Styler stylesheet
These methods are described in more detail in Methods of Incorporating APP Code into a Stylesheet .
For a full summary of the integration of APP in Arbortext Styler, see Arbortext Advanced Print Publisher in Arbortext Styler