除了标题幻灯片之外，如何在RMarkdowns的ioslides中放置徽标？

Question

I am looking for a way to create a custom css file, which allows me put a logo on each slide except on the title slide. So far, I was able to embed it to each slide using:

 body {
   background-image: url("log.png");
   background-size: 20%;
   background-repeat: no-repeat;
   background-position: 3% 96%;
 }

In addition, I don't want to set the logo in YAML but rather directly in the css file and it is not supposed to be part of the footer. I'm stuck and any help is highly appreciated.

Answer 1

Put this in style.css :

 slides > slide:not(.title-slide) {
   background-image: url("log.png");
   background-size: 20%;
   background-repeat: no-repeat;
   background-position: 3% 96%;
 }

and then include the style using YAML

output: 
  ioslides_presentation:
    css: style.css