[Libreoffice-bugs] [Bug 141249] New: VIEWING: Navigating through a Writer document using pg-up and pg-dn keys is unpredictable.

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=141249

            Bug ID: 141249
           Summary: VIEWING: Navigating through a Writer document using
                    pg-up and pg-dn keys is unpredictable.
           Product: LibreOffice
           Version: 7.1.1.2 release
          Hardware: x86-64 (AMD64)
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: patrick at scphotographic.com

Description:
I am a writer. I need to read Writer documents easily, but if I use the pg-dn
and pg-up keys they do not behave as expected, and their behaviour is
inconcistent. In 'Normal' view, I am looking at an 8-page document, a chapter
in a book. The chapter title is styled 'Heading 2', the first paragraph is
styled 'First paragraph' - I don't know if this has any bearing.

With the cursor in the first paragraph I press 'pg-dn'. The page view moves
only to the beginning of the third paragraph/7th line, not, as I would expect,
to 2 or 3 lines before the end of the page, which would give an overlap which
would allow my brain and eyes to continue reading without a pause. Instead I
have to search for my place on the page.

If I place the cursor in the second paragraph, the page view starts five lines
further down in the text. The exact position in the text that the view moves to
seems to be dependent on which line the cursor is positioned on. If I position
the cursor on the penultimate line, then the view moves to one line below, ie a
single line overlap.

If I place the cursor on the first line and press pg-dn twice, the second
screen change takes me to a position where there is a negative overlap of 2
lines, ie two lines of text appear neither at the bottom of the 'second' page
nor at the top of the 'third' page.

The behaviour of these keys is inconsistent. Another incosistency is that if I
press pg-dn and then pg-up I do not return to the same place, which is what I
would expect and what happens in other programmes.

If I click in the scroll bar, below the handle, the behaviour is more
consistent, with a consistent overlap of six lines. This overlap is too much
for me to be able to read without interruption; I have to pause to find my
place on each page.

I am viewing the document at 100%.

Steps to Reproduce:
1. Open a multi-page document
2. Press pg-dn key
3. Press pg-dn key again, or pg-up

Actual Results:
See description above

Expected Results:
pg-dn should move the page view to start with an overlap of one, two or three
lines


Reproducible: Always


User Profile Reset: No



Additional Info:
Version: 7.1.1.2 (x64) / LibreOffice Community
Build ID: fe0b08f4af1bacafe4c7ecc87ce55bb426164676
CPU threads: 4; OS: Windows 10.0 Build 19041; UI render: Skia/Raster; VCL: win
Locale: en-GB (en_GB); UI: en-GB
Calc: threaded

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