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How To Enlarge Type Size In Thunderbird

Whatsoever take chances to adjust the font size EVERYWHERE in this ridiciously shrinked layout of Thunderbird 68.i.0? Theme Font & Size Changer is to no avail anymore.

Sorry, just what the heck happened? You removed css, so layout.css.devPixelsPerPx is gone, likewise.

Sorry, merely what the heck happened? You removed css, then layout.css.devPixelsPerPx is gone, too.

Chosen solution

On computer: Annotation: If you are using a screen resolution that is large eg: lots of pixels per inch/cm then everything on desktop will appear smaller.

I employ 1920 x 1080 and everything looks ok.


There is a mode to overstate fonts size in Folder Pane, Message List etc You need to do the following. Make Subconscious files and folder visible:

  • http://kb.mozillazine.org/Show_hidden_files_and_folders

In Thunderbird:

  • Assistance > Troubleshooting Information
  • click on 'Open folder' push

a new window opens showing the contents of your Profile binder.

  • Close Thunderbird now - this is important.
  • Create new binder and telephone call information technology chrome notation the spelling - use a lower case 'c' It should exist in the same place as the 'Post' binder.
  • open Notepad
  • Copy everything - all the text between lines below and paste information technology into the Notepad certificate.

/*   * Do not remove the @namespace line -- it's required for correct functioning  */  @namespace url("http://www.mozilla.org/keymaster/gatekeeper/at that place.is.only.xul");   /* *Brand all the default font sizes eg:xiv px: */     * { font-size:                      14px !important; }                    

If this proves to be too small you tin edit the 14px to say 16px etc

  • Save the document as filename userChrome.css in the 'chrome' folder. Note the spelling all lower case except for the 'C'.

First Thunderbird.

See images as guide:

Read this answer in context πŸ‘ two

All Replies (20)

Called Solution

On figurer: Note: If you lot are using a screen resolution that is big eg: lots of pixels per inch/cm so everything on desktop will appear smaller.

I use 1920 x 1080 and everything looks ok.


There is a manner to enlarge fonts size in Binder Pane, Message List etc You need to practice the post-obit. Make Hidden files and binder visible:

  • http://kb.mozillazine.org/Show_hidden_files_and_folders

In Thunderbird:

  • Aid > Troubleshooting Information
  • click on 'Open up folder' button

a new window opens showing the contents of your Contour folder.

  • Close Thunderbird now - this is important.
  • Create new folder and call information technology chrome note the spelling - apply a lower case 'c' It should be in the same identify as the 'Mail' binder.
  • open Notepad
  • Copy everything - all the text between lines below and paste it into the Notepad document.

/*   * Exercise not remove the @namespace line -- it's required for correct operation  */  @namespace url("http://www.mozilla.org/keymaster/gatekeeper/in that location.is.merely.xul");   /* *Make all the default font sizes eg:14 px: */     * { font-size:                    14px !important; }                  

If this proves to be too small you lot can edit the 14px to say 16px etc

  • Save the document as filename userChrome.css in the 'chrome' folder. Note the spelling all lower case except for the 'C'.

Outset Thunderbird.

Meet images as guide:

On computer: Note: If you lot are using a screen resolution that is large eg: lots of pixels per inch/cm then everything on desktop volition appear smaller. I employ 1920 x 1080 and everything looks ok. In that location is a style to overstate fonts size in Folder Pane, Message List etc Yous need to do the following. Make Hidden files and folder visible: * http://kb.mozillazine.org/Show_hidden_files_and_folders In Thunderbird: * Help > Troubleshooting Information * click on 'Open binder' push a new window opens showing the contents of your Profile folder. * Shut Thunderbird now - this is important. * Create new folder and telephone call it '''chrome''' annotation the spelling - use a lower instance 'c' It should be in the aforementioned place as the 'Mail' binder. * open Notepad * Copy everything - all the text betwixt lines below and paste information technology into the Notepad certificate. ------------------------------------- <pre> /* * Exercise not remove the @namespace line -- it'southward required for right functioning */ @namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* *Brand all the default font sizes eg:fourteen px: */ * { font-size: '''14'''px !important; } </pre> --------------------------------------- If this proves to be also small you can edit the 14px to say 16px etc * Save the certificate as filename '''userChrome.css''' in the ''''chrome'''' folder. Note the spelling all lower case except for the 'C'. Start Thunderbird. See images as guide:

Modified by Toad-Hall

Swell, Toad-Hall! Thanks a lot, indeed.

Nifty, Toad-Hall! Thanks a lot, indeed.

I just did this and it worked, so cheers! But the airs of these coders, or else ignorance, boggles the imagination. "I use 1920 10 1080 and everything looks ok." Aforementioned rez here just 8pt/px text is RIDICULOUS! And to take to create and edit a CSS file while ok for me is across the patience. People will go back to browser e-mail.

I just did this and it worked, so thanks! But the arrogance of these coders, or else ignorance, boggles the imagination. ''"I use 1920 ten 1080 and everything looks ok."'' Same rez here only 8pt/px text is RIDICULOUS! And to have to create and edit a CSS file while ok for me is beyond the patience. People will go dorsum to browser electronic mail.

Howdy there rootazoid,

quite foreign though - simply fortunately a actually slap-up turn that layout.css.devPixelsPerPx is back for me now!

Have a wait here, please: http://forums.mozillazine.org/viewtopic.php?p=14777372&sid=92e66eb42c2462b2f03a6735db2e699c#p14777372

I am on a 3840x2160, setting the value to 2,4 and I am good to become.

Hi there rootazoid, quite foreign though - simply fortunately a really great plow that layout.css.devPixelsPerPx is back for me now! Have a look here, delight: http://forums.mozillazine.org/viewtopic.php?p=14777372&sid=92e66eb42c2462b2f03a6735db2e699c#p14777372 I am on a 3840x2160, setting the value to 2,4 and I am good to become.

Modified by Max Barrett

It would seem that non all computers are the same and people do have differing requirements when it comes to eg: size of font. Are we surprised, of form not, simply that'south the dazzler of Thunderbird, you tin alter things to adjust your requirements and you practise non necessarilly have to utilise an addon.

The solutions in this question provide two methods for anyone to tailor your Thunderbird to suit your specific requirements.


re: layout.css.devPixelsPerPx Yep this is now available in Thunderbird and should assist people with a quick method. Full instructions on locating where to make adjustments.

  • 'Menu icon (iii lines) > Options > Options > Avant-garde > 'General' tab
  • click on 'Config Editor' button

It may say 'here be dragons' as a type friendly warning to be conscientious :)

  • In top search type: pixels
  • Await for this line: layout.css.devPixelsPerPx

The default is -one.0

  • Double click on that line to open a small window.
  • articulate contents and type in eg: 1.5
  • click on OK


For anyone using this information. RE: the kickoff solution: It might seem a little daunting to create a userChrome.css file, but if y'all can exercise the following and so information technology is like shooting fish in a barrel equally pie and offers good command over font size. Annotation: there is no requirement to know code.

  • Able to follow instructions
  • Create a binder
  • Open Notepad program
  • Copy and paste provided text.
  • Save a file

It would seem that not all computers are the same and people do have differing requirements when it comes to eg: size of font. Are we surprised, of class not, but that's the dazzler of Thunderbird, you can modify things to adjust your requirements and you practice non necessarilly accept to utilize an addon. The solutions in this question provide two methods for anyone to tailor your Thunderbird to adapt your specific requirements. re: ''layout.css.devPixelsPerPx'' Yep this is now available in Thunderbird and should help people with a quick method. Total instructions on locating where to make adjustments. * 'Carte du jour icon (3 lines) > Options > Options > Advanced > 'General' tab * click on 'Config Editor' button It may say 'here exist dragons' as a type friendly warning to be conscientious :) * In top search type: pixels * Look for this line: '''layout.css.devPixelsPerPx''' The default is -i.0 * Double click on that line to open up a small window. * articulate contents and blazon in eg: 1.5 * click on OK For anyone using this information. RE: the first solution: It might seem a little daunting to create a userChrome.css file, just if you can practice the post-obit then it is easy every bit pie and offers proficient control over font size. Note: in that location is no requirement to know code. * Able to follow instructions * Create a folder * Open Notepad programme * Copy and paste provided text. * Save a file

Called solution very helpful.

Chosen solution very helpful.

Changing pixels to 1.50 worked for me. Thunderbird should check the current resolution, if necessary, to make certain information technology displays equally well as any other app. Please fix this bug.

Changing pixels to 1.50 worked for me. Thunderbird should cheque the current resolution, if necessary, to make certain it displays also as whatever other app. Delight fix this bug.

I did the css pixel edit the UI responded nicely. Simply inside the emails I still go some where the text is tiny, like 7 or eight point. Maybe there'south some setting that overrides the sender's font size?

I did the css pixel edit the UI responded nicely. But inside the emails I still get some where the text is tiny, like vii or 8 point. Maybe there's some setting that overrides the sender's font size?

rootazoid said

Maybe at that place's some setting that overrides the sender's font size?

Yeah, there'southward an option to change only the mail text size. Menu > Tools > Options > Display > Formatting > Fonts&Colors > Size . And there is besides Carte > Tools > Options > Limerick > General > HTML > Size.

Also, email text size tin be changed by Ctrl+Mouse Cycle, if you lot happen to take a Mouse Wheel. There may be a keyboard equivalent for this.

All of these are independent of the Tiny Font Fix that uses the Config Editor.

Such complex design!

''rootazoid [[#answer-1275737|said]]'' <blockquote> Maybe in that location's some setting that overrides the sender's font size? </blockquote> Yes, at that place's an option to change only the mail text size. Menu > Tools > Options > Display > Formatting > Fonts&Colors > Size . And there is also Menu > Tools > Options > Composition > General > HTML > Size. Likewise, email text size can exist changed past Ctrl+Mouse Cycle, if you lot happen to have a Mouse Bicycle. In that location may be a keyboard equivalent for this. All of these are contained of the Tiny Font Fix that uses the Config Editor. Such complex design!

I've been in that location, done that. I have Menu > Tools > Options > Display > Formatting > Fonts&Colors > Size set to 22 for my old optics on my 23" 1920x1080 and it fails to exercise anything for the offending emails.

I've been in that location, done that. I take Menu > Tools > Options > Display > Formatting > Fonts&Colors > Size set to 22 for my quondam eyes on my 23" 1920x1080 and it fails to do annihilation for the offending emails.

For the fonts in letters: Options/Display/Formatting/Fonts & Colors/Advanced, set the Sizes and fonts with Fonts for: Latin and repeat with Fonts for: Other Writing Systems. Uncheck 'Allow messages to use other fonts'.

Do non modify the Options/Composition settings from their defaults.

For the fonts in messages: Options/Display/Formatting/Fonts & Colors/Avant-garde, ready the Sizes and fonts with Fonts for: Latin and repeat with Fonts for: Other Writing Systems. Uncheck 'Allow messages to employ other fonts'. Do not change the Options/Composition settings from their defaults.

If cipher else works, including the size settings in Windows, you lot'll but have to reduce the resolution setting for your monitor. This will take the effect of making everything larger but displaying less (fewer pixels) on the screen. Information technology's an unavoidable eventual tradeoff if your eyes are old, like yours and mine.

If aught else works, including the size settings in Windows, you'll just have to reduce the resolution setting for your monitor. This will have the consequence of making everything larger but displaying less (fewer pixels) on the screen. It's an unavoidable eventual tradeoff if your eyes are old, like yours and mine.

I only tried Ctrl+Mouse Wheel, didn't need to wait, worked, thanks!

I just tried Ctrl+Mouse Bicycle, didn't need to wait, worked, cheers!

Modified by rootazoid

David Spector said

If nothing else works, including the size settings in Windows, you'll just accept to reduce the resolution setting for your monitor.

Not sure what you hateful by the size settings in Windows, simply of course I practice know near resolution, simply stubbornly pass up.

''David Spector [[#reply-1275743|said]]'' <blockquote> If nothing else works, including the size settings in Windows, y'all'll just have to reduce the resolution setting for your monitor. </blockquote> Not sure what yous mean past the size settings in Windows, simply of grade I exercise know about resolution, but stubbornly refuse.

sfhowes said

Fonts for: Latin and repeat with Fonts for: Other Writing Systems. Uncheck 'Allow messages to use other fonts'.

OK I only ready it up that way, at 22, for Latin and Other. So I looked at some former emails that show in 8. They still did.

''sfhowes [[#answer-1275742|said]]'' <blockquote> Fonts for: Latin and repeat with Fonts for: Other Writing Systems. Uncheck 'Allow letters to apply other fonts'. </blockquote> OK I simply set it up that way, at 22, for Latin and Other. Then I looked at some old emails that show in 8. They still did.

rootazoid said

I just did this and information technology worked, and so thank you! But the arrogance of these coders, or else ignorance, boggles the imagination. "I employ 1920 x 1080 and everything looks ok." Same rez here only 8pt/px text is RIDICULOUS! And to have to create and edit a CSS file while ok for me is beyond the patience. People will become back to browser email.


I agree. I'thou pretty smart about stuff but I am Not a programmer and this is ridiculous. I contribute $$ where I can instead to developers, etc. But I have no friggin' idea nearly how to do this and meanwhile I can't read diddly on my laptop. Please, either somebody come over to my house (in rural Oregon) or make this display option part of Thunderbird! Option B is probably easier, yes???

''rootazoid [[#answer-1260270|said]]'' <blockquote> I merely did this and it worked, so thanks! Only the arrogance of these coders, or else ignorance, boggles the imagination. ''"I utilize 1920 x 1080 and everything looks ok."'' Same rez here merely 8pt/px text is RIDICULOUS! And to accept to create and edit a CSS file while ok for me is beyond the patience. People will go dorsum to browser electronic mail. </blockquote> I concur. I'm pretty smart virtually stuff just I am Not a developer and this is ridiculous. I contribute $$ where I tin instead to developers, etc. But I take no friggin' thought about how to do this and meanwhile I tin can't read diddly on my laptop. Delight, either somebody come over to my house (in rural Oregon) or make this display option part of Thunderbird! Option B is probably easier, yes???

Ctrl+Mouse Bike seems to be the piece of cake manner. Information technology'd be nice if the coders would code a claw to make the Ctrl+Mouse Wheel result exist the default. Eh?

Ctrl+Mouse Cycle seems to exist the piece of cake manner. It'd exist nice if the coders would code a hook to make the Ctrl+Mouse Wheel result exist the default. Eh?

KateCamp: You lot need to provide information on what exactly is the problem. If y'all need help and so y'all must be explicit in stating where you experience the trouble and the respond depends upon that information. It is besides a good idea to say what Bone you are using.

Font size effects various parts and some are easily gear up in Options > Display as mentioned by sfhowes. If the problem is a full general UI including folders, message list , menus etc issue so utilise the instructions to access 'about: config' window via Options > Advanced to alter the pixel size. Total instructions are given in a previous comment by me and I suggest this might exist a proficient identify to beginning if you have a general UI issue. Some people may only want to alter eg: the Folder Pane, and then would need to create a 'userChrome.css' file in which case information you can copy can be provided equally a tailor made solution.

So almost options for tweaking what you lot want are already within Thunderbird. At no point does anything require any knowledge of programming or code. Just at the most information technology will crave you to be able to follow instructions, create folders, create and salvage files and copy and paste provided text. At that place are very few people who do not have those skills.

This question has a 'Chosen Solution' and also other solutions equally comeback in Options that recent versions take provided.

KateCamp: You need to provide information on what exactly is the trouble. If you need assist so you must be explicit in stating where you feel the problem and the reply depends upon that information. It is besides a good idea to say what Bone you are using. Font size effects various parts and some are easily set in Options > Display every bit mentioned by sfhowes. If the problem is a full general UI including folders, message list , menus etc consequence then use the instructions to admission 'about: config' window via Options > Advanced to change the pixel size. Full instructions are given in a previous comment by me and I suggest this might exist a practiced place to kickoff if you take a full general UI issue. Some people may merely want to modify eg: the Folder Pane, then would need to create a 'userChrome.css' file in which instance information you can copy can exist provided as a tailor fabricated solution. So most options for tweaking what you want are already within Thunderbird. At no signal does anything require any knowledge of programming or code. But at the most it will crave you to be able to follow instructions, create folders, create and save files and copy and paste provided text. There are very few people who exercise not take those skills. This question has a 'Called Solution' and besides other solutions equally improvement in Options that recent versions have provided.

Fantastic, this worked perfectly. Nosotros were afraid nosotros'd have to stop using Thunderbird because the font was and so tiny. Thank you and then much!

Fantastic, this worked perfectly. We were afraid we'd take to terminate using Thunderbird because the font was then tiny. Thank y'all so much!

Modified by LisaM

Toad-Hall: I think most of us know exactly to what I am referring in this thread. And I am perfectly capable of post-obit directions (and don't much appreciate the tone of that remark). I've been using Thunderbird for years and every major update requires additional work to make it usable again. I tried post-obit your directions but institute them non quite adequate. And that'due south not the point. I join many, many other users in asking for the capabilities of the Theme Font and Size changer to exist incorporated into Thunderbird to work across all platforms.

Toad-Hall: I recall most of usa know exactly to what I am referring in this thread. And I am perfectly capable of following directions (and don't much capeesh the tone of that remark). I've been using Thunderbird for years and every major update requires additional piece of work to make it usable again. I tried following your directions just found them non quite adequate. And that's non the indicate. I join many, many other users in asking for the capabilities of the Theme Font and Size changer to exist incorporated into Thunderbird to work across all platforms.

Modified past KateCamp

How To Enlarge Type Size In Thunderbird,

Source: https://support.mozilla.org/mk/questions/1269283

Posted by: galassohopil1938.blogspot.com

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