Precisions on workflows

docs/developper_docs.md

@@ -157,6 +157,10 @@ in [constants_phaeo](/constants_phaeo.py). To invoke a workflow using Bioblend,
 required to provide both the input files (datasets) and the parameters separately as two dictionaries. 
 In the gga_run_workflow scripts, these two are respectively named "datamap" and "workflow_parameters".
 
+Some of these tools parameters are specific to Phaeoexplorer data, but it is possible to modify them
+by importing the template workflow in Galaxy, editing the desired parameters values, download it and 
+replace the workflow in the [workflows_phaeoexplorer](/workflows_phaeoexplorer) 
+(Be careful, the workflow must keep the same name).