refactor(doc): Add additional comments to log capture readme

tools/CaptureLogs/readme.md

@@ -8,12 +8,14 @@ We have provided the following convenience scripts for log collection using `log
 1. Launch Powershell with administrator privileges.
 2. To start capturing traces, invoke `iot_startlog.ps1`.
    1. Pass in the following required parameters:
-      1. `-TraceName` - the name of the event trace data collector.
+      1. `-TraceName` - the name of the event trace data collector.  This can be any name that will be used to identity the collector created.
       2. `-Output` - the output log file that will be created. This should be a `.etl` file.
       3. `-ProviderFile` - The file listing multiple Event Trace providers to enable. The file should be a text file containing one provider per line.
         The Azure IoT SDK providers file is present [here](https://github.com/Azure/azure-iot-sdk-csharp/blob/master/tools/CaptureLogs/iot_providers.txt). The providers list with their corresponding package details are present [here](https://github.com/Azure/azure-iot-sdk-csharp/tree/master/tools/CaptureLogs#azure-iot-sdk-providers).
 
   Sample usage:
+
+  To create an event trace data collector called `IotTrace`, using the file `iot_providers.txt` for the list of event providers to be enabled, putting the results in a file `iot.etl` in the same folder from where the command is invoked, type:
   ```powersehll
   .\iot_startlog.ps1 -Output iot.etl -ProviderFile .\iot_providers.txt -TraceName IotTrace
   ```