diff --git a/README.md b/README.md
index a9e827036777707cfd3e4722c16b3dd8fddf3695..83e88a152b92188d60874df012febdad41e3bce5 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,8 @@ Feel free to give feedback and feature requests or to take part in the developme
 
 `DataPaths.rdata =  {dataset1, dataset2};`  file names of the datasets (they most be at the path)
 
+You should either set a ProjectID in the config.json (copy & rename the 'example-config.json' to 'config.json'), or pass it as option 'ProjectID' to the TagPlot function.
+
 # PlotID.TagPlot()
 `[figs, IDs] = TagPlot(figs, options)`
 **TagPlot** adds IDs to figures
diff --git a/example-config.json b/example-config.json
index 9df3f40d142af73340a15197d7787e9485809211..92b8621a1d43e5fc26290fa6acce3be448471d3e 100644
--- a/example-config.json
+++ b/example-config.json
@@ -1,5 +1,5 @@
 {   
-    "Author": "Example Author"
+    "Author": "Example Author",
     "ProjectID": "AB01", 
     "ServerPath": "\\\\Server\\path\\folder"
-}
\ No newline at end of file
+}