more clear "How to sign the CLA"

editions/tw5.com/tiddlers/community/Contributing.tid

@@ -24,6 +24,12 @@ Like other OpenSource projects, TiddlyWiki5 needs a signed contributor license a
 
 Create a GitHub pull request to add your name to `cla-individual.md` or `cla-entity.md`, with the date in the format (YYYY/MM/DD).
 
+''step by step''
+
+# click [[licenses/CLA-individual|https://github.com/Jermolene/TiddlyWiki5/tree/master/licenses/cla-individual.md]] or [[licenses/CLA-entity|https://github.com/Jermolene/TiddlyWiki5/tree/master/licenses/cla-entity.md]]
+# in `cla-individual.md` or `cla-entity.md` click icon on the top-right corner (clicking this button will fork the project so you can edit the file)
+# add you name under the bottom
+
 eg: `Jeremy Ruston, @Jermolene, 2011/11/22`
 
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