I can't add combobox or select box to my website. how can i addI will be glad if you help.

Hey, I would like to set the black background for all posts' blocks (both text and picture cell). Can I do it for one and apply it to all others?

Dear friends. I really DO NEED to have the possibility to SELECT MULTIPLE ELEMENTS AT ONCE in order 2 apply to the same settings to all f them. An EXAMPLE ca be if we have 6 cards in a Features...