Bugzilla

You can control ALL font size via the 'Config Editor'
Preference: layout.css.devPixelsPerPx
has default NEGATIVE -1.5 setting.
If you edit and use a POSITIVE 1.25 or 1.5 it will increase th overall font size because it has increased the pixel size.
therefore no need to alter any other font if this is a general overall increase required.

You can now control all font sizes via the 'Menu Bar' - this was introduced because it's more user friendly than using Config Editor.
View > Font size> select increase or decrease font size as require.
In the menu app icon there is 'Font size' and you clicko n the - or + icons to increase/decrease pixel size of font.

But if like me you find the default font setting may be perfectly ok for general UI, but you want to modify the font size for reading incoming mail and creating new emails, then you access Settings to adjust specifics for incoming unicode/western etc font settings.

You can control the Font size as displayed in Message Pane:
Settings > General > Language & Appearance > Fonts & Colors - click on 'Advanced'.
The Font Size you set will determine what is deemed as  'Medium'.
The minimum font size will force any size font less than the setting to be displayed using that minimum font size.
So if Minimum font size is 12 then any fonts in Messages that use less than 12 will get auto displayed using 12.
Always set up 'Fonts for 'Latin' and 'Other Writing Systems' and any other specific langauge type you use eg: Greek
Always set up each one with identical font size settings.

Settings > Composition > HTML Style
Advise you use 'Variable width' and Font Size 'Medium'
These settings mean it does not force your preferred settings onto other people.
It means the 'Medium' will use the font size you set up here:
Settings > General > Language & Appearance > Fonts & Colors - click on 'Advanced'.

In addition to this, you can manipulate an increase in a font size when creating a new mail - maybe you are creating a topic header and want  it a size incremented larger. The Formatting Bar' has the 'T' increase and decrease option for one off alterations.

I find the current set up is now very easy to control.
It goes wrong when users set up incorrect settings that clash or override other settings. eg: setting up a minimum font size that is larger than all other font size settings.

You can control ALL font size via the 'Config Editor'
Preference: layout.css.devPixelsPerPx
has default NEGATIVE **-1.0** setting.
If you edit and use a POSITIVE 1.25 or 1.5 it will increase th overall font size because it has increased the pixel size.
therefore no need to alter any other font if this is a general overall increase required.

You can now control all font sizes via the 'Menu Bar' - this was introduced because it's more user friendly than using Config Editor.
View > Font size> select increase or decrease font size as require.
In the menu app icon there is 'Font size' and you clicko n the - or + icons to increase/decrease pixel size of font.

But if like me you find the default font setting may be perfectly ok for general UI, but you want to modify the font size for reading incoming mail and creating new emails, then you access Settings to adjust specifics for incoming unicode/western etc font settings.

You can control the Font size as displayed in Message Pane:
Settings > General > Language & Appearance > Fonts & Colors - click on 'Advanced'.
The Font Size you set will determine what is deemed as  'Medium'.
The minimum font size will force any size font less than the setting to be displayed using that minimum font size.
So if Minimum font size is 12 then any fonts in Messages that use less than 12 will get auto displayed using 12.
Always set up 'Fonts for 'Latin' and 'Other Writing Systems' and any other specific langauge type you use eg: Greek
Always set up each one with identical font size settings.

Settings > Composition > HTML Style
Advise you use 'Variable width' and Font Size 'Medium'
These settings mean it does not force your preferred settings onto other people.
It means the 'Medium' will use the font size you set up here:
Settings > General > Language & Appearance > Fonts & Colors - click on 'Advanced'.

In addition to this, you can manipulate an increase in a font size when creating a new mail - maybe you are creating a topic header and want  it a size incremented larger. The Formatting Bar' has the 'T' increase and decrease option for one off alterations.

I find the current set up is now very easy to control.
It goes wrong when users set up incorrect settings that clash or override other settings. eg: setting up a minimum font size that is larger than all other font size settings.