https://www.elsevier.support/elsevierebooksplus/answer/how-do-i-change-the-font-size
How do I change the font size? | Elsevier eBooks+ Support Center
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https://blog.smashwords.com/2010/04/smashwords-ebooks-support-live-tocs.html?showComment=1272429128919&m=0
Smashwords: Smashwords Ebooks Support Live ToCs
Smashwords authors can now add enhanced navigation to their ebooks with linked, clickable ToCs. This is good news for our 4,992 authors (we ...
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