It doesn’t cover the tools. That makes sense, the tools shouldn’t matter — if they can get out of your way that is. I would argue, to put this advice into practice means allocating your focus away from the kerning of application settings and onto ideas. The right tool can give you the means to do that. It is worth thinking about, if you're going to head advice such as this;
The actual slides are the most immediately visible but also the least substantively important part of your material. While I’m going to highlight a few rules and techniques about making decent slides, do not lose sight of the fact that if your paper is bad, your talk is going to be bad too.
The paper is not the talk. The paper is what the talk is about. In some fields, the talk can be very closely related to the paper, and there are still people trained to “read the paper” in the old-fashioned sense. But this is increasingly rare. In most fields, especially when presenting the results of a data analysis, the presenter must condense, summarize, and highlight the important parts of their own work. The paper is the most important thing; the talk is about the paper; and you use your slides to help you give a better talk.