Quote:
Originally Posted by Marinolino
At first it also showed only the left column(s) (of your two-column pdf) in my Koreader too, but after I've turned a scroll mode (continuous view) off, changed margins-crop from none to auto and later to semi-auto, as well as tried out a zoom & pan mode and reflow-mode, Koreader's zoom-to-fit-column mode has started showing two-columns as expected (1,2,3,4 i.e. left column upper part, left column lower part, right column upper part, right column lower part).
So, I don't know what was the reason for the left-column issue, but it should work in the end as expected.
If we want narrower columns (when fonts are too big for our liking) we should use Koreader's manual-page-crop beforehand (cropping margins on the left and right side at a desired width) or its none-button (margins as in an original document, i.e. left intact).
For easier continuation of reading between the page-quarters there is also a page-overlap function, and we can choose between gray-out mode (all visible lines from the previous page quarter will be shown as gray, not black) or arrow mode (a very tiny triangle is shown, almost like a dot, on the very left side of the last line from the previous page quarter).
We can use both swiping & tapping for flipping through screens and I've also set the right-swipe as a quicker go-back function, after we've used a link/bookmark or maybe accidentally went to the other part of the file.
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In the zoom & pan mode (tap on the left upper corner for the book icon to appear and double tap on column to zoom in, then pan) double tapping on a column will usually zoom it in so as to completely fit the screen (smaller margins, bigger fonts), whereas double tapping beneath or above the column will make it narrower i.e. with bigger margins and consequently smaller fonts.
We can use this feature for quicker two-column reading (by tapping instead of panning) while in zoom&pan mode; double tap above the first column (zooming-in on the upper half of the 1st column), then double tap on column to zoom out, then double tap below the first column (zooming-in on the lower half of the 1st column), then double tap on column for zooming out, etc.
Before I've used to crop multi-column pdfs like in the attachement, so that every small 6" or 8" reader could read it quickly and easily.
Since 8" readers are pretty wide (12 cm) in portraite mode and a column in two-column pdf is about 8 cm wide on the paper, we can include more of the adjacent column in our pdf-cut, in order to make the column narrower (i.e. fonts smaller) when using fit-to-page-width mode.
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Thanks for the detailed answer!
Two thinks that you've mentioned I can't find in my v2015.11-1607...2018-03-29 Koreader - margins-crop and zoom & pan mode.
Is it a matter of version?