Le 31/05/2018 à 11:08, Heiko Tietze a écrit :
On 31.05.2018 10:58, Pedro Rosmaninho wrote:
       * Gridlines on zoom
        +https://bugs.documentfoundation.org/show_bug.cgi?id=117348
        + different color (dark grey) (Pedro)
          + available as option (see c15) (Regina)
        + adjust dot's distance depending on zoom factor (Heiko)
        + dots should remain a reasonable size and shift in conjunction with 
zoom (Stuart)
        => change it similar to dashed line of text boxes; zoom in goes with 
smaller distance and larger dots

​Since I was traveling home and couldn't join:

As Regina said, it is possible to change color now (and I changed the color in 
my instalation) however LO needs sane defaults that make it usable by most 
people.
It's a bit silly to keep a default color for the dots with terrible contrast 
and visibility from the time of Open Office...
The grid is turned off by default already. Anyone that turns it on, is because 
it needs to use it as an auxiliary tool. If it's barely visible, because it is 
Light Gray on White Background then it becomes nearly useless.
Also the steps to change its color require the user to really dig deep into the 
options menu. Should we expect that from a novice user or even an intermediate 
user?
You are the only advocate of a darker color and we agreed in the meeting to 
keep the light grey. It works perfectly at 100% and just needs adjustment for 
other zoom levels.

I know I'm discussing after the meeting but you could add me in CC of such bugs if you want me to see them.

If a sighted person report to us the contrast is not good we shouldn't think in term of number of people, IMO we should think in term of usability. Most of visual-impaired people I've met and also myself need contrasted stuff on their screen. It's also useful for elderly people and most of people we obtain a better UX on their computer.

Pedro is fully right, PowerPoint is more contrasted than LibreOffice Impress in his screenshots. Why we shouldn't be as contrasted as PowerPoint ? It's not needed to have a dotted background but having black dot on rectangle box is, indeed, helpful.

The accessibility guidelines of the W3C WCAG 2.0 guidelines specify to use a contrast level of at least 4.5 : see https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-contrast.html

@Heiko: Hope my feedback could help to decide.

Best regards,
Alex.

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