Magento 2: Theme change field is missing in Design Tab

Question

I created a new theme but when i tried to change the theme from

stores -> configuration -> design Tab I found that theme change field is missing from design tab. Please look at screen-shot below. Can anyone tell me why theme change field is not coming. I am using Magento ver. 2.1.5.

Answer 1

As of Magento 2.1.x they have moved themes into content=>design

Answer 2

First check that your theme structure looks like this under,

app/design/frontend/<vendor>/
├── <theme>/
│   ├── etc/
│   │   ├── view.xml
│   ├── web/
│   │   ├── images
│   │   │   ├── logo.svg
│   ├── registration.php
│   ├── theme.xml
│   ├── composer.json

Check all the files properly. And delete var/generation files and then refresh any admin page having added the theme files to the files system, your theme gets registered and added to the database And also delete any entry made in database of your theme ,if any.
Or you can send your code so i can check whats's wrong. Hope this helps you..

Answer 3

Run these commands to enable the developer mode, to disable the cache and etc:

alias mage="php -d memory_limit=-1 -f bin/magento"
mage deploy:mode:set developer
chmod -R 775 pub/static/ var/ pub/media/ &&
rm -rf var/view_preprocessed/ var/cache/ var/page_cache/ var/tmp/ var/generation/ pub/static/frontend/ ;
mage cache:disable &&
mage indexer:reindex &
mage setup:upgrade &&
mage setup:static-content:deploy && 
mage setup:db-data:upgrade &&
mage dev:source-theme:deploy &&
chmod -R 775 pub/static/ pub/media/ var/