References, headers, images

OurBigBook loves headers and headers!

Reference to a header: paragraphs, links, code, math.

Reference to a header with custom text shown: bla bla bla bla.

We can also specify the actual ID explicitly: paragraphs, links, code, math, but this is only useful in some edge cases.

With topic links, we can link to OurBigBook Web topics directly for topics you haven't yet written about yourself:

In mathematics I really like the fundamental theorem of calculus.

Make it show the section number as well with {full}: Section "Paragraphs, links, code, math".

Make it uppercase and plural: OurBigBook loves Bananas!

Reference to the following image: Figure 1. "Xi Chrysanthemum is a very nice image".

An YouTube video: Video 1. "Sample YouTube video.".