Then I created a newsletter and I assigned to it my custom theme.
But If I MODIFY THE PHP CODE IN THE THEME, in example in the file theme.php the updates did not show in the editor.
Let me exemplify:
I create a new theme from Theme-3.
I add that line somewhere in the body: <?php echo “test”; ?>
I create a newsletter from that custom theme.
I see the string “test” in the body.
THEN I go in the php file and I change “test” in “toast”.
I upload, refresh, empty chace and so on BUT in the editor of the cited newsletter the string rest as “test”: NO MODIFY AT ALL.
Surely I miss something in the mechanism of the plugin, but what?
If you change the theme you must regenerate a new newsletter. The theme run once when you choose it to generate the newsletter, it cannot change the editor content. You should be able to see modification to the theme on the preview before move to the editor.