Allow to resize images when insert or modify them
Nathan Middleton commented
For a Windows 10 device it seems reasonable there would be mouse-usable resize gadgets. I often times have used plumbago on my Surface while as a laptop and constantly reaching up to touch and manipulate things is much harder than ushering the touchpad or mouse. Maybe adding a resize gadget to one of the corners would would nicely?
You can modify the size when you insert or modify the images. After you insert (same is true on modify), you will see a little "X" in upper right part of the image. That allows you to delete it. This shows you that you are in "modify" mode. When it is in modify mode, you can do a "pinch" and can modify the size.