Thank you, the video helped me understand )) It turns out that I just needed to insert "Read More" after a short description in the default Joomla Editor article editor.
But another question arose: how to fix the desired image size and so that the amount of text in the short description does not change it?
I copied the CSS code of the image I modified and placed it in the Custom CSS of the template, then added the Class specified in the page code to the first field of the Blog section of the "Main CSS class of materials" categories. But my changes are not saved!
Tell me, please, where and how can I correct the display of the elements of the main page of the blog with the code? How to save changes?
Custom CSS not working for Blog in Joomla 4?