Thanks for your answer.
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					Originally Posted by  Doitsu
					 
				 
				Sigil is primarily an editor not an authoring tool. You may want to consider writing your book with a word processor or a dedicated authoring tool. 
			
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 Point taken. 
I did begin with Writer at first, but found out that the conversion required a lot of manual tuning, especially as I have a lot of images and screencopies to include. As it is, I can now upload the work in progress on the KDP website and check the result in Kindle mode.
	Quote:
	
	
		
			
				
					Originally Posted by  Doitsu
					 
				 
				This usually only happens if the whole book is a single .html file. You may want to consider splitting it up in chapters using  Split Markers. This will greatly improve the responsiveness of Sigil.  
			
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 I don't think that is the reason as I already have quite many HTML files. Maybe the number of titles? or images?
	Quote:
	
	
		
			
				
					Originally Posted by  Doitsu
					 
				 
				AFAIK, the styles in the default TOC style-sheet (sgc-toc.css) are hard-coded. However, you can add TOC styles to your main stylesheet and link it to TOC.xhtml. 
			
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 I also use the default TOC style-sheet. But the fonts (and some other standard styles) are defined in another stylesheet that is shared by all the HTML files of the whole document. As for now, I have to re-link this additional sheet to the TOC every time I re-generate the HTML TOC.
	Quote:
	
	
		
			
				
					Originally Posted by  Doitsu
					 
				 
				AFAIK, only dedicated authoring tools have this feature, which is one more reason to use Sigil only for fine-tuning the books that they create. 
			
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 Could it be submitted as a feature request? Sigil already has a lot of very interesting automaticisms; this one would be a good addition, I think.