In 5.6, we could use $_SESSION but in 5.7, there is a built-in session class from Symphony.
Change the default photo of the day login page background image to a custom background image of your choice.
Change the default values for the block and block area custom style sliders.
Use Composer to declare your dependencies and download a third party library for use in your package. This example will use Stripe PHP.
Creating a Full screen Header Image for the Anitya Theme is simple, but it doesn't involve the Header Image block as you might assume on first glance. Here's how to use your awesome image as a page header.
Use a .ttf or .otf file to create a font face kit for your website.
In 5.6 we always had the possibility to override any class in the core. How can we do this in 5.7?
Although concrete5 features an auto-updater, there is also the option to manually upgrade a site to a new version through some simple steps. The video in this how-to demonstrates how to perform a manual upgrade on a typical server.