The settings in the drop down in the Posts page that includes things like image crop size and image thumbnail card size, do not save settings between visits.
I would really like it if it did save. Or, make image crop size full by default.
The main problem for me is the image crop size can really destroy visibilty of an image from the thumbnail. And I often even forget that its a setting, so I dont even remember that the thumbnails are being cropped.