I am using AEM 6.4 want to list only project specific workflow in drop down list of "start workflow" and hide the out of the box workflows. Please suggest the best possible approach.
Just add Workflow: Systemtagin the page properties of the OOTB workflow models. So it will hide all the OOTBS workflows from the drop-down list of Start Workflow option and it will only show the workflow models which do not contains workflow:System tag.