The element setting Teaser display is supported for the following teaser types:

0:00
0:52
The element setting Teaser display is available for various list teasers. This allows you to customize the output of the teaser.
The following output formats are supported:
The element setting Teaser display is supported for the following teaser types:
In lists, the lead stories can optionally be shortened on mobile devices. Only the headline, date, and image (if available) are then displayed, but not the introductory text.
This reduces the need for users to scroll through long lists with lots of text on mobile devices.
This option is controlled via the “Teaser display ” element setting of the list. If this is available, there is an additional option called “Reduced - Mobile shortened”.