Remove strange file and update alt texts

Author: Michael Zappe

articles/remote-rendering/how-tos/performance-tracing.md

@@ -60,7 +60,7 @@ Use traces on PC to either get familiar with the tools or if you have an issue w
 
 Afterwards your WPR configuration should look like this:
 
-![WPR configuration.](./media/wpr.png)
+![Screenshot of the Windows Performance Recorder with a selected AzureRemoteRenderingNetworkProfiling profile.](./media/wpr.png)
 
 ### Recording
 
@@ -74,7 +74,7 @@ You now have an ETL file that you can open in WPA.
 
 To record a trace on a HoloLens, boot up your device and enter its IP address into a browser to open up the *Device Portal*.
 
-![Device Portal.](./media/wpr-hololens.png)
+![Screenshot of the Performance Tracing webpage in the HoloLens Device Portal.](./media/wpr-hololens.png)
 
 1. On the left, navigate to *Performance > Performance Tracing*.
 1. Select **Custom profiles**.
@@ -122,7 +122,7 @@ Windows Performance Analyzer is the standard tool to open ETL files and inspect
 
 To get started with ARR tracing, the following pieces are good to know.
 
-![Performance graph.](./media/wpa-graph.png)
+![Screenshot of an example graph in the Windows Performance Analyzer tool.](./media/wpa-graph.png)
 
 The image shows a table of tracing data and a graph representation of the same data.
 
@@ -134,15 +134,15 @@ All **columns to the left of the yellow bar** are interpreted as **keys**. Keys
 
 The columns in the middle have no special meaning.
 
-![Events view.](./media/wpa-event-view.png)
+![Screenshot of the Generic Events View Editor in the Windows Performance Analyzer tool.](./media/wpa-event-view.png)
 
 In the *Generic Events View Editor* you can configure all the columns to display, the aggregation mode, sorting and which columns are used as keys or for graphing. In the example image, **Field 2** is enabled and Field 3 - 6 are disabled. Field 2 is typically the first *custom data* field of an ETW event and thus for ARR "FrameStatistics" events, which represent some network latency value. Enable other "Field" columns to see further values of this event.
 
 ### Presets
 
 To properly analyze a trace, you need to figure out your own workflow, and preferred data display. However, to be able to get a quick overview over the ARR-specific events, we include Windows Software Protection Platform profile and presets files in the folder *Tools/ETLProfiles*. To load a full profile, select *Profiles > Apply...* from the WPA menu bar, or open the *My Presets* panel (*Window > My Presets*) and select *Import*. The former sets up a complete WPA configuration as in the image below this paragraph. The latter only makes presets for the various view configurations available and allow you to quickly open a view to look at a specific piece of ARR event data.
 
-![Presets.](./media/wpa-arr-trace.png)
+![Screenshot of the Windows Performance Analyzer tool with the ARR presets applied.](./media/wpa-arr-trace.png)
 
 The image shows views of various ARR-specific events plus a view of the overall CPU utilization.