Quote:
Originally Posted by MacEachaidh
Wouldn't using an em as the measurement make the space dependent on the font?
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Yes.
Quote:
Originally Posted by MacEachaidh
So if I shifted up in point size, the gap at the bottom of the paragraph would widen as well? Could get messy.)
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Not messy, proportional. For any reflowing text where users routinely resize their fonts
em is the best way to create consistent looking paragraph indents and spacing between paragraphs.
If you used
pt and you edited your your initial doc as a 8pt font with 3pt margins above and below each paragraph making a 6pt gap, it would look fine until a user resized the font up to 32pt (which for folks over 40 is common enough on a 6in 600x800 screen) now you have a large font and the spacing between paragraphs (6pt) is most likely smaller then the line spacing between normal sentences. Now that is messy, letters could start overlapping.
I like having a space between paragraphs so I use calibre's default which is .5em below and above each paragraph. I also use 1.1em for indents.
If you don't want spaces between your paragraphs then 0 as exampled Vintage Season is the way to go.
Update: I was just thinking and left and right margins do need to be fixed with PT or PX because as you scale the font size up you could lose valuable real estate if the left and right margins grew too.