Text of Featured Slider

Hello, above all sorry for my English. I would like to know how to make that at the Featured Slider appears only a determinated part of the ID text.

Example:
In the third slide, the text displayed by default:
"Entidades vinculadas
APAE mantiene vínculos con distintas entidades a nivel nacional e internacional, como son los casos de FAPE, ENAJ e IFAJ La Federación de Asociaciones de Periodistas de España (FAPE) es la primera organización profesional de periodistas de España con… "

But would appeared:
“APAE mantiene vínculos con distintas entidades a nivel nacional e internacional, como son los casos de FAPE, ENAJ e IFAJ”

Thank you very much and congratulations for your good job!

You can edit this text via WordPress Excerpts. Once you open this Post/Page in Edit screen you should see Excerpt field under text box. If there is no such field you can enable it via Screen Options.

You can add any text there and it will appear on your slider.