Opencart 2.3.0.2 - new custom theme not available in the admin panel -

i create new custom theme copy paste default theme of opencart 2.3.0.2 , rename theme not display in admin panel->system->settings , store (default)=> 'edit'. can me regard. thank anticipation .

previous answered deleted. here link (and instructions it):

http://undefined.gr/site/2016/10/09/custom-opencart-2-3-0-2-theme/

1. copy folder upload/catalog/view/theme/default -> upload/catalog/view/theme/mytheme
2. copy file upload/admin/controller/extension/theme/theme_default.php -> upload/admin/controller/extension/theme/mytheme.php
   • change class name in file mytheme.php controllerextensionthemethemedefault controllerextensionthemetfm (line 2).
   • in mytheme.php replace “theme_default” text “mytheme“.
3. copy file upload/admin/view/template/extension/theme/theme_default.tpl upload/admin/view/template/extension/theme/mytheme.tpl
   • in mytheme.tpl replace “theme_default” text “mytheme“.
4. copy file upload/admin/language/en-gb/extension/theme/theme_default.php upload/admin/language/en-gb/extension/theme/mytheme.php.
   • in mytheme.php change theme title (line 3).
5. rename file upload/catalog/view/theme/mytheme/image/default.png mytheme.png.