EASA Client mode refers to the fashion an EASAP can be chosen to be authored using the EASAP Builder tool as opposed to the Web Browser fashion.
The resulting EASAP will run on the User's computer using their EASA Client installation instead of their web browser, making the EASA Client installation mandatory on every endpoint of EASA.
While EASA supports EASA Client mode, new features are not made for it as development is focused on creating and improving Web Browser Client functionality. As a result, EASA Client documentation is not maintained on these pages and is available in a PDF format on request.
If you would like to know more about authoring in EASA Client mode, please let us know at firstname.lastname@example.org.