The default width of the task pane in Office add-ins is quite small, making styling difficult when you want to display more content in it. At a 1366x768 resolution, for Excel desktop the width of the task pane is 320 pixels.
It would be nice if we could customize the default width of the task pane from the manifest or via the Office JS API.
Great idea, it will be nice to have the same feature also for Word addin.
