[OS X TeX] new preview behavior (Sierra)?

[Herbert Schulz]

> On Aug 9, 2017, at 9:06 PM, Nicolae Garleanu <garleanu at berkeley.edu> wrote:
> 
> Hi Herb,
> Just to be safe, I upgraded my laptop from 3.82 to 3.85, the behavior is the same. Pdfkit looks like the probable culprit, but in that case I would also expect other people to have experienced the issue.
> Nicolae 
> 
> 
> 
> On Aug 9, 2017, at 10:17, Herbert Schulz <herbs at wideopenwest.com> wrote:
> 
> 
>> On Aug 9, 2017, at 11:46 AM, Nicolae Garleanu <garleanu at berkeley.edu> wrote:
>> 
>> Hello everybody, 
>> 
>> Preview seems to behave differently in at least one respect, on all my computers, since I upgraded to Sierra (10.12.5). On one computer, I have Texshop 3.77 installed. (Probably same, o/w slightly more recent, on the other.) Maybe the issue has got to do with pdfkit, as I also experience it with Skim, though not with Acrobat. In that case, perhaps the most one could hope for is that Apple implement a change at some point.
>> 
>> It’s a bit difficult to explain, but here it is. It concerns the single page display format. In the past, when I scrolled down (say; symmetric behavior moving up) to the bottom of the page, I would eventually get to the next page, from the top. (This is still Acrobat behavior, which helps me confirm it is what feels natural to me.) (For those who are wondering why I don’t use multipage, one reason is that with multipage there is a stage where one has both the bottom margin of one page and top margin of next on the screen taking space simultaneously.) Now, however, once I hit the bottom of first page, further scrolling brings up directly the bottom of the following page, and so on. Even worse, the preview is highly sensitive, so that most of the time trying to scroll back up brings the previous page. (I think that the way to avoid this part is to try to scroll very slowly, and not lift the fingers off the trackpad.) In short, it’s as if scrolling becomes ‘next page/previous page’ command once at the bottom (or top) of the page.
>> 
>> I hope this is clear. Even more, that some of you will recognize the behavior. 
>> 
>> Nicolae 
> 
> Howdy,
> 
> Please update to the latest version of TeXShop, 3.84 (3.85 should be coming out soon), and see if the problem is still there. If so it's probably a PDFKit problem and you'll have to wait for High Sierra to come out for a fix. NOTE: there are other bugs in PDFKit in Sierra that are known to be fixed in High Sierra.
> 
> Good Luck,
> 
> Herb Schulz
> (herbs at wideopenwest dot com)

Howdy,

I use Multipage but I just checked with Single Page and, indeed, I see what you are talking about. I admit I never liked Single Page because I always felt like there was a bit of a flash as it went to the next page but I think it skipped to the top of the next page rather than partway down.

Good Luck,

Herb Schulz
(herbs at wideopenwest dot com)