updating header and format

updating header and format

Author: rakeshrana44

articles/azure-monitor/essentials/metrics-troubleshoot.md

@@ -70,9 +70,9 @@ Azure metrics charts use dashed line style to indicate that there is a missing v
    > [!NOTE]
    > If you still prefer a line chart for your metric, moving mouse over the chart may help to assess the time granularity by highlighting the data point at the location of the mouse pointer.
 
-## Prefixes of metrics
+## Units of measure in metrics charts
 
-By default azure monitor metrics uses SI based prefixes. Metrics will only be using IEC prefixes if the resource provider has chosen an appropriate unit for a metric.
+Azure monitor metrics uses SI based prefixes. Metrics will only be using IEC prefixes if the resource provider has chosen an appropriate unit for a metric.
 For ex: The resource provider Network interface(resource name: rarana-vm816) has no metric unit defined for "Packets Sent". The prefix used for the metric value here is k representing kilo (1000), a SI prefix. 
 ![Screenshot that shows metric value with prefix kilo.](./media/metrics-troubleshoot/prefixSI.png)
 
@@ -82,28 +82,28 @@ And the resource provider Storage account(resource name: ibabichvm) has metric u
 SI uses decimal
 
 |   Value   | abbreviation |          SI         |
-|-----------|--------------|---------------------|
-|   1000	  |  k	 | kilo  |
-|   1000^2  |  M   | mega  |
-|   1000^3  |  G	 | giga  |
-|   1000^4  |  T	 | tera  |
-|   1000^5  |  P	 | peta  |
-|   1000^6  |  E	 | exa   |
-|   1000^7  |  Z   | zetta |
-|   1000^8  |  Y	 | yotta |
+|:---------:|:------------:|:-------------------:|
+|   1000	  |  k	         | kilo                |
+|   1000^2  |  M           | mega                |
+|   1000^3  |  G	         | giga                |
+|   1000^4  |  T	         | tera                |
+|   1000^5  |  P	         | peta                |
+|   1000^6  |  E	         | exa                 |
+|   1000^7  |  Z           | zetta               |
+|   1000^8  |  Y	         | yotta               |
 
 IEC uses binary
 
-|Value | abbreviation|	IEC | Legacy ||
-|------|-------------|-----|----|----|
-|1024  |  Ki|	kibi|	K	| kilo|
-|1024^2|	Mi|	mebi|	M	| mega|
-|1024^3|	Gi|	gibi|	G	| giga|
-|1024^4|	Ti|	tebi|	T	| tera|
-|1024^5|	Pi|	pebi|	-	||
-|1024^6|	Ei|	exbi|	-	||
-|1024^7|	Zi|	zebi|	-	||
-|1024^8|	Yi|	yobi| - ||
+|Value | abbreviation| IEC |Legacy|     |
+|:----:|:-----------:|:---:|:----:|:---:|
+|1024  |  Ki         |kibi |	K	  | kilo|
+|1024^2|	Mi         |mebi |	M	  | mega|
+|1024^3|	Gi         |gibi |	G	  | giga|
+|1024^4|	Ti         |tebi |	T	  | tera|
+|1024^5|	Pi         |pebi |	-	  |     |
+|1024^6|	Ei         |exbi |	-	  |     |
+|1024^7|	Zi         |zebi |	-	  |     |
+|1024^8|	Yi         |yobi |  -   |     |
 
 
 ## Chart shows unexpected drop in values