[10:45] <mpt> kemmko, a three-column window I designed a few years ago: https://bug619866.bugzilla-attachments.gnome.org/attachment.cgi?id=183091
[10:55] <kemmko> and it has a bottom edge!
[10:55] <kemmko> mpt:  see above, and thanks
[10:56] <kemmko> mpt:  I am not that worried about design but more about the behaviour of each panel especially if the app goes from phone/tablet to desktop environment
[10:57] <mpt> kemmko, I think we’ve discussed this before … Generally panes are replaced by hierarchy. For example Mail is three-pane on a Mac, two-pane on an iPad, one-pane on an iPhone.
[10:58] <mpt> Replaced by hierarchy as the screen gets smaller, I mean.
[10:59] <kemmko> mpt:  here is the thing, in many cases we don not need as three panel layout
[10:59] <kemmko> mpt:  at least for our convergent apps, it works just fine with the 2 panel for tablet/desktop
[11:00] <mpt> kemmko, well, sure, you don’t *need* it, you could just use hierarchy regardless of screen size. But there’s a reason mail clients usually aren’t one- or even two-pane on a desktop: it’s annoying.
[11:01] <mpt> Specifically it slows navigation and scanning of adjacent/new items.
[11:05] <kemmko> mpt:  actually many are in a two panel mode
[11:07] <mpt> kemmko, especially back in the 1990s when the standard display size was 800*600, two-pane was more common or a more prominent option. <http://www-archive.mozilla.org/mailnews/specs/threepane/images/Mail2.gif>
[11:07] <mpt> (You can still configure Thunderbird to do that now, it just takes more work.)
[11:08] <kemmko> mpt:  this panels are staked one on top of each other, I am talking about the ones next to each other
[11:20] <mpt> kemmko, ok, so when you said two panel mode, you meant three panes in two columns? Yes, that’s still common (I use it), but three-column is increasingly common because average PC screen size+resolution is still increasing. If the screen is large enough for three columns, doing that lets you see more of a message, therefore reduces the probability that you need to scroll to read a message.
[11:23] <kemmko> mpt:  I never talked about "panes" always about panels and those are columns
[11:23] <mpt> kemmko, sorry, I’m not familiar with the difference between a pane and a panel :-)
[11:24] <kemmko> mpt:  np
[11:24] <kemmko> mpt:  at the moment I am looking into default behaviour for two panels/columns for desktop…
[11:25] <kemmko> mpt:  a 3 panel/column one will come be defined at a later point, we didn't have the time to look into that so far
[11:26] <mpt> ok