alt text edits

Author: tfitzmac

articles/azure-resource-manager/managed-applications/microsoft-common-checkbox.md

@@ -11,7 +11,7 @@ The CheckBox control lets users check or uncheck an option. The control returns
 
 ## UI sample
 
-:::image type="content" source="./media/managed-application-elements/microsoft-common-checkbox.png" alt-text="Screenshot of Microsoft.Common.CheckBox UI element with a checked and unchecked state.":::
+:::image type="content" source="./media/managed-application-elements/microsoft-common-checkbox.png" alt-text="Screenshot of Microsoft.Common.CheckBox UI element with an unchecked state.":::
 
 ## Schema
 

articles/azure-resource-manager/managed-applications/microsoft-common-fileupload.md

@@ -11,7 +11,7 @@ A control that allows a user to specify one or more files to upload.
 
 ## UI sample
 
-:::image type="content" source="./media/managed-application-elements/microsoft-common-fileupload.png" alt-text="Screenshot of Microsoft.Common.FileUpload UI element in action.":::
+:::image type="content" source="./media/managed-application-elements/microsoft-common-fileupload.png" alt-text="Screenshot of Microsoft.Common.FileUpload UI element in Azure portal.":::
 
 ## Schema