Please add above comment to the other topic. I created the topic to see how many people are interested in such an option. The more people want something like this, the better the chance that a code change will be accepted by the dev. I can implement this in less than 10 minutes, but it takes a lot more time to get such a change accepted and merged.
Are you sure that a default landscape format makes sense? How many people really would want to export their notes to a landscape format? I mean if you set it to a certain setting it will always export it to the page format until one changes the setting again.