Just as Drupal 8 allows you to change the public facing theme, it also allows you to change the theme for your administration area. This way you can customize the look and feel of your back end. Below is a quick guide on how to switch the admin theme for your Drupal 8 website.
How to change your administration theme
- Log into your administrative dashboard.
Locate the upper menu toolbar and click on the Menu tab.
A second menu toolbar will appear under the first. From this one, click on the Appearance option.
This leads you to the main Theme screen. From here, scroll to the bottom of the page to the Administration Theme area. You will see a dropdown list entitled Administration Theme. Use the list to find the specific theme you want to use for your admin area. Selecting the Default option will make the admin area use the same theme as the rest of the site.
There is also a checkbox named Use the administration theme when editing or creating content. This will allow you to use the selected admin theme on the nodes when you create or edit them as opposed to the site-wide theme.