Xaml Package Manager formats the xaml when saving it to a file. There are numerous settings affecting the formatting: line length, indentation, tabs or spaces, attribute formatting etc., etc. At present there is no UI for changing these options (it would probably take longer to write and test than the formatting code itself), but it is planned to provide a UI in the near future, time permitting. Settings (suiting my own preferences) are defined in a Json blob in XamlPackageManager.exe.config so you can edit that if you really want to try to change formatting style.

Hosting functionality now enables a more wysiwyg view in the WPF designer. The designer also takes advantage of improvements in TFWStatusControls to provide dynamic font resizing when the view size is changed.