SideNotes allows to export your notes to images. Just like this one below:
To create such image, simply click Share button in the note:
And choose Save as Image option. Then choose the file location, and you’ll get an image with your note content. Alternatively, you can choose Copy Image option and paste the image wherever you want: into Twitter post, document, message, etc.
Additionally, you may find more options for image exporting in Preferences → Exporting. You can choose a background you like (or make it transparent), margins and ratio. You can also choose if the bottom bar should be hidden.