https://bugs.kde.org/show_bug.cgi?id=385163
Bug ID: 385163
Summary: email rendering does not respect system font DPI
settings
Product: kmail2
Version: 5.4.3
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: UI
Assignee: kdepim-b...@kde.org
Reporter: k...@dhardy.name
Target Milestone: ---
I'm using a high-DPI screen. In System Settings → Fonts, I set "Force fonts
DPI" to a larger value (currently 192), and most application text gets
increased in size. Not so with emails rendered in KMail2 (I can open the email
and zoom with Ctrl+WheelUp, but it's not automatic).
FYI Konqueror seems to have the same problem. So does Firefox, but it has its
own workarounds (and it's not KDE software).
I found two maybe-related bug reports; both about print size:
https://bugs.kde.org/show_bug.cgi?id=372662
https://bugs.kde.org/show_bug.cgi?id=78264
Alternatively I guess it would be okay to scale email rendering by the screen
DPI, not by the "force font DPI" setting.
As a workaround, setting the env var QT_SCALE_FACTOR=2 would "work" — but it's
an ugly hack which doubles the size of everything, including the useless
margins and all the UI elements which have already been increased in size
(through System Settings → Icons, Application Style, "force font DPI", and
possibly more); i.e. to use it effectively I'd have to set it desktop-wide at
startup and revert all the other tweaks, then put up with huge margins in all
the UIs.
Summary: automatically scale email rendering by "force font DPI" / default=96,
or by screen DPI
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