docs(troubleshooting): a worked URL-parameter example for the hook read

docs/dci-troubleshooting.md

@@ -196,16 +196,26 @@ A service called directly (for instance from a URL, or by a script), or by an ol
 
 ### Reading the tables from a hook
 
-A [hook script](macros.md) is `%include`d into the running service, so it shares the service's WORK library and can read the tables directly. To pick up a URL parameter by name:
+A [hook script](macros.md) is `%include`d into the running service, so it shares the service's WORK library and can read the tables directly. Take an embedded editor opened at:
+
+```
+https://datacontroller.io/#/editor/SASHELP.CLASS?labels=true&embed=va
+```
+
+`browser_url_vars` then holds a row per parameter - `labels=true` and `embed=va` - so a hook can pick up either by name:
 
 ```sas
 %let labels=N;
+%let embed=N;
 
 %if %sysfunc(exist(work.browser_url_vars)) %then %do;
   proc sql noprint;
     select value into :labels
     from work.browser_url_vars
     where name = 'labels';
+    select value into :embed
+    from work.browser_url_vars
+    where name = 'embed';
   quit;
 %end;
 ```