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Originally Posted by ratinox
What's amusing to me about this is that ADE pages are in fact based on screen size and point size. One ADE page is approximately 1K of text or about 1/4 of one 8.5x11" printed page with 10 point text or about one screen's worth of text on a 6" reader.
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ADE page numbers may very well have been designed to be roughly 1 page = 1 screen on 6" Reader. But, there are a number of factors that determine the page count and how much is in a page. For example, if you streamline the code in an ePub you make the page count more accurate. That means that instead of doing a <p class="indent"> for every normal indented paragraph, you fix the CSS code so you just need <p>. That makes more of the 1024 bytes be the actual book and less of the code.
ADE page numbers work for larger screens. My H2O screen is 6.8". Newer Readers can be 7", 7.8", 8" 10.3" or 13". You do get used to the page numbers once you've settled on what settings for your eBook work for you.
As far as Kobo goes, I like ADE page numbers with the new progress bar. That gives even more information then before.
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ADE pages cannot be any more precise because ADE pages and percentages are the same numbers. Don't confuse what the numbers are with how they are displayed. Percentages could easily be displayed with decimal parts. I don't know if this is a good idea or not.
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If ADE page numbers are not a percentage. if they were, then you would have no more then 100 pages. pBook page numbers are as much a percentage as ADE page numbers and that is not at all. They are an indicator of where you are in your book. But the difference between ADE page numbers and percent is that with percent, you have no idea how long/large the eBook is. So if you are at25%, you don't know how much you have left. 75% doesn't say how much is left. Now if you have ADE pages and you are on page 25 of 175, you know how long you have left.
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ollowing your reasoning and tempering with the origin of ADE pages which appear to beloved around here I come to the conclusion that the only self-consistent way to numerically paginate an ebook on an ebook reading device is by page turns.
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ADE page numbers are not governed by your settings. They don't change when you change the font, font-size, margins, or line-height. They don't change if you have headers or footers being displayed or not. They are the same on a 6" screen or an 8" screen. So if I tell you something is on page 34, it is on page 34 on your device. If I was reading where one screen = 1 page, I could not tell you that something was on page 34 as page 34 on my device would not be page 34 on yours.