Merge pull request #244864 from tfitzmac/0713images

update alt text

Author: prmerger-automator[bot]

articles/azure-resource-manager/management/preview-features.md

@@ -30,27 +30,27 @@ The portal only shows a preview feature when the service that owns the feature h
 1. Sign in to the [Azure portal](https://portal.azure.com/).
 1. In the search box, enter _subscriptions_ and select **Subscriptions**.
 
-    :::image type="content" source="./media/preview-features/search.png" alt-text="Azure portal search.":::
+    :::image type="content" source="./media/preview-features/search.png" alt-text="Screenshot of Azure portal search box with 'subscriptions' entered.":::
 
 1. Select the link for your subscription's name.
 
-    :::image type="content" source="./media/preview-features/subscriptions.png" alt-text="Select Azure subscription.":::
+    :::image type="content" source="./media/preview-features/subscriptions.png" alt-text="Screenshot of Azure portal with subscription selection highlighted.":::
 
 1. From the left menu, under **Settings** select **Preview features**.
 
-    :::image type="content" source="./media/preview-features/preview-features-menu.png" alt-text="Azure preview features menu.":::
+    :::image type="content" source="./media/preview-features/preview-features-menu.png" alt-text="Screenshot of Azure portal with Preview features menu option highlighted.":::
 
 1. You see a list of available preview features and your current registration status.
 
-    :::image type="content" source="./media/preview-features/preview-features-list.png" alt-text="Azure portal list of preview features.":::
+    :::image type="content" source="./media/preview-features/preview-features-list.png" alt-text="Screenshot of Azure portal displaying a list of preview features.":::
 
 1. From **Preview features** you can filter the list by **name**, **State**, or **Type**:
 
     - **Filter by name**: Must contain text from a preview feature's name, not the **Display name**.
     - **State**: Select the drop-down menu and choose a state. The portal doesn't filter by **Unregistered**.
     - **Type**: Select the drop-down menu and choose a type.
 
-    :::image type="content" source="./media/preview-features/filter.png" alt-text="Azure portal filter preview features.":::
+    :::image type="content" source="./media/preview-features/filter.png" alt-text="Screenshot of Azure portal with filter options for preview features.":::
 
 # [Azure CLI](#tab/azure-cli)
 
@@ -169,7 +169,7 @@ Some services require other methods, such as email, to get approval for pending
 1. Select the link for the preview feature you want to register.
 1. Select **Register**.
 
-    :::image type="content" source="./media/preview-features/register.png" alt-text="Azure portal register preview feature.":::
+    :::image type="content" source="./media/preview-features/register.png" alt-text="Screenshot of Azure portal with Register button for a preview feature.":::
 
 1. Select **OK**.
 
@@ -253,7 +253,7 @@ You can unregister preview features from **Preview features**. The **State** cha
 1. Select the link for the preview feature you want to unregister.
 1. Select **Unregister**.
 
-    :::image type="content" source="./media/preview-features/unregister.png" alt-text="Azure portal unregister preview feature.":::
+    :::image type="content" source="./media/preview-features/unregister.png" alt-text="Screenshot of Azure portal with Unregister button for a preview feature.":::
 
 1. Select **OK**.
 

articles/azure-resource-manager/management/request-limits-and-throttling.md

@@ -13,7 +13,7 @@ Throttling happens at two levels. Azure Resource Manager throttles requests for
 
 The following image shows how throttling is applied as a request goes from the user to Azure Resource Manager and the resource provider. The image shows that requests are initially throttled per principal ID and per Azure Resource Manager instance in the region of the user sending the request. The requests are throttled per hour. When the request is forwarded to the resource provider, requests are throttled per region of the resource rather than per Azure Resource Manager instance in region of the user. The resource provider requests are also throttled per principal user ID and per hour.
 
-![Request throttling](./media/request-limits-and-throttling/request-throttling.svg)
+:::image type="content" source="./media/request-limits-and-throttling/request-throttling.svg" alt-text="Diagram that shows how throttling is applied as a request goes from the user to Azure Resource Manager and the resource provider.":::
 
 ## Subscription and tenant limits
 

articles/azure-resource-manager/management/resource-providers-and-types.md

@@ -80,23 +80,23 @@ To see information for a particular resource provider:
 2. On the Azure portal menu, select **All services**.
 3. In the **All services** box, enter **resource explorer**, and then select **Resource Explorer**.
 
-    ![select All services](./media/resource-providers-and-types/select-resource-explorer.png)
+    :::image type="content" source="./media/resource-providers-and-types/select-resource-explorer.png" alt-text="Screenshot of selecting All services in the Azure portal.":::
 
 4. Expand **Providers** by selecting the right arrow.
 
-    ![Select providers](./media/resource-providers-and-types/select-providers.png)
+    :::image type="content" source="./media/resource-providers-and-types/select-providers.png" alt-text="Screenshot of selecting providers in the Azure Resource Explorer.":::
 
 5. Expand a resource provider and resource type that you want to view.
 
-    ![Select resource type](./media/resource-providers-and-types/select-resource-type.png)
+    :::image type="content" source="./media/resource-providers-and-types/select-resource-type.png" alt-text="Screenshot of selecting a resource type in the Azure Resource Explorer.":::
 
 6. Resource Manager is supported in all regions, but the resources you deploy might not be supported in all regions. Also, there may be limitations on your subscription that prevent you from using some regions that support the resource. The resource explorer displays valid locations for the resource type.
 
-    ![Show locations](./media/resource-providers-and-types/show-locations.png)
+    :::image type="content" source="./media/resource-providers-and-types/show-locations.png" alt-text="Screenshot of showing locations for a resource type in the Azure Resource Explorer.":::
 
 7. The API version corresponds to a version of REST API operations that are released by the resource provider. As a resource provider enables new features, it releases a new version of the REST API. The resource explorer displays valid API versions for the resource type.
 
-    ![Show API versions](./media/resource-providers-and-types/show-api-versions.png)
+    :::image type="content" source="./media/resource-providers-and-types/show-api-versions.png" alt-text="Screenshot of showing API versions for a resource type in the Azure Resource Explorer.":::
 
 ## Azure PowerShell