Custom theme selection

Question

I am new to Magento front end development while creating my custom theme,

I have created app\design\frontend\custom\themename and inside that created my theme.xml file.

<theme xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Config/etc/theme.xsd">
     <title>themename</title> <!-- your theme's name -->
     <parent>Magento/blank</parent> <!-- the parent theme, in case your theme inherits from an existing theme -->
     <media>
         <preview_image>media/preview.jpg</preview_image> <!-- the path to your theme's preview image -->
     </media>
 </theme>`

But in Stores->Configuration->Design->Design Theme not showing my theme name in dropdown

Answer 1

You need to create media folder and inside that folder add your preview.jpg file.

Create registration.php file inside theme,

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
                \Magento\Framework\Component\ComponentRegistrar::THEME,
                'frontend/custom/themename',
                __DIR__
);

Run command,

php bin/magento setup:upgrade

php bin/magento setup:static-content:deploy

Check your theme inside

Content -> Design -> Configuration

Now check in your backend,

Clear cache and var folder content.

Thanks.

Answer 2

You need to create registration.php to register your theme.

Registration.php file code :

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
                \Magento\Framework\Component\ComponentRegistrar::THEME,
                'frontend/Vendorname/themename',
                __DIR__
);

After that clear the cache by running cache:clean command and check it will show in design configuration setting dropdown

Also from admin click on Content->Design->Configuration here you can see your custom theme

For more details refer this link - http://devdocs.magento.com/guides/v2.1/frontend-dev-guide/themes/theme-create.html