minor readme change

README.md

@@ -5,8 +5,11 @@
 ### Draw Graphs used for Testing
 
 To draw all graphs, respectively create ```.tex``` snippets (that make use of the 
-[tikz-network](https://www.ctan.org/pkg/tikz-network)).
+[tikz-network](https://www.ctan.org/pkg/tikz-network)), use:
 
 ```bash
-python draw_graphs.py [export_dir_path]
+python draw_graphs.py [path]
+
+    path -  Path to the location where the .tex files
+            should be exported to. Default is './plots'.
 ```