TF&SC is mainly intended to modify fonts for menus and threads and folder panes. To make permanent changes to the fonts for messages, open Tools/Options/Display/Formatting/Fonts & Colors/Advanced... and change the Size settings, both for Fonts for: Latin and Other Writing Systems. You might also benefit from unchecking 'Allow messages to use other fonts'.

https://support.mozilla.org/en-US/questions/1239826

sfhowes,

I appreciate your reply. However, your response did not help with the issue.

Let me try and describe this issue a little better: When clicking on a message in the inbox, the message response font size is nearly impossible to read. This is the problem!

The message listings with regards to font size in the inbox are no problem.

Why is it the overall font sizing in TB is difficult to figure out as a general user?

Regards,

mikeandsylvia

I'm not sure you can affect the size of the response from within Thunderbird with getting all complicated with CSS.

Have you increased the screen resolution DPI setting in your operating system?

Wayne,

Have tried changing the DPI settings. No change!!

Why would the text size in the inbox message listings be OK but when I open any message the size of the text is nearly unreadable? Yet, if I click on reply or forward, the text size changes to a readable size again.

In older versions of TB, this was not a problem. The problem occurred on the latest release (60.5.0).

Your help would be appreciated.

mikeandsylvia

Make sure you have the fixed version of TF&SC:

https://addons.thunderbird.net/en-us/thunderbird/addon/theme-font-size-changer-fixed/

Under TF&SC Options, change the Zoom setting to something like 125% or 150%.

sfhowes,

Unfortunately, your previous suggestions did not help my problem.

Let me clarify the issue as to what is happening when using TB:

1. When I open the Inbox in TB, the messages listing text size is OK.

2. When I open a specific message, the text size is unreadable for these 78 year old eyes.

3. If I click on message reply or forward, the text size returns to OK.

I am aware of the "ctrl / mouse wheel or +/- to change text size.

Also, prior to the latest release of Thunderbird (60.5.0), this problem did not exist.

Hoping you or other support guys can help on this irritating issue.

Sincerely,

mikeandsylvia

Your issue is understood, but it's not clear if you have followed the suggestions provided earlier. Did you install the correct add-on and change the settings as recommended? You must realize your problem is specific to your setup and not due to any shortcoming in TB, otherwise this forum would be flooded with similar complaints.

sfhowes,

Your previous suggestions (Checking for the correct add-on & changing the zoom setting) were carried out to no avail.

Sincerely,

mikeandsylvia

I'm using both DPI, THunderbird settings, and TF&S settings

Wayne,

Your ideas were appreciated. However, this did not help my problem.

This is ridiculous. Why is Thunderbird so complex on the issue of text sizing and fonts?

Sincerely,

mikeandsylvia

This is a solvable issue, so I don't understand why you are having difficulty

Note however, I think you are mistaken about https://addons.thunderbird.net/en-us/thunderbird/addon/theme-font-size-changer-fixed/ being able to change text size of message display and replies in message compose.

Wayne,

OK, let's start this discussion without the use of Theme Font & Size Changer.

If I remove TF&SC and open TB, all of the Font /Text sizing in inbox and messages etc is so small, I can hardly read it.

Please lead me down the right path how to increase the text/ font sizing from this point forward.

Sincerely,

mikeandsylvia

While we're taking a step back, please post a screen shot, and describe your video setup.

Wayne,

Now you are losing this old geezer of 78.

A screen shot? and of what?

Describe the video set-up?

mikeandsylvia

At this point I do not see any information provided telling the forum what settings you are currently using.

Please tell us what you have for the following:

• 'Menu icon' > 'Options' > 'Display' > 'Formatting' tab
• click on 'Advanced..' button

the 'Fonts & Encodings' window opens It will look like image below.

What 'size' have you got selected ?

How to create and Post an image.

• press the 'Prt Scr' key on keyboard to capture image of what you see on the screen
• Open an image program like 'Paint'.
• 'Edit' > 'Paste'

• 'File' > 'Save as'
• Save image as jpg to your desktop.

Then in this forum question you can add images by clicking on 'Browse', selecting the jpg file you just created and saved on desktop. click on 'Open'.

Toad-Hall,

Per your request, the image is attached.

Looking forward to your response.

mikeandsylvia

Please post the following information: In Thunderbird

• 'Help' > 'Troubleshooting Information'
• click on 'Copy text to clipboard' button
• In this forum question, right click in a 'Post a Reply' text box and select 'Paste'
• You can edit/remove all info on accounts and printers, but do not remove anything else. We need to see the list of addon extensions and anything to do with fonts.
• click on 'Post Reply' button

Please perform this test: restart Thunderbird in Safe Mode.

In Thunderbird 'Help' > 'Restart with addons disabled'

Report back on results regarding font size of emails.

Toad-Hall,

Attached trouble shooter Info per your request.

Will report further on Safe Mode Op.

mikeandsylvia

 Application Basics

   Name: Thunderbird
   Version: 60.5.1
   Build ID: 20190213094837

   Update Channel: release
   User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1
   OS: Windows_NT 10.0

   Multiprocess Windows: 0/0 (Disabled)
   Web Content Processes:
   Stylo: content = true (enabled by default), chrome = true (enabled by default)
   Enterprise Policies:
   Google Key: Missing
   Mozilla Location Service Key: Missing
   Safe Mode: false

 Extensions

     Name
     Version
     Enabled
     ID

       Lightning
       6.2.5.1
       true
       {e2fda1a4-762b-4020-b5ad-a41df1933103}

       Theme Font & Size Changer for Thunderbird
       64.6
       true
       [email protected]

 Security Software

   Type: Name

     Antivirus: Windows Defender Antivirus
     Antispyware: Windows Defender Antivirus
     Firewall: Windows Firewall

 Graphics

     Features
     Compositing: Direct3D 11 (Advanced Layers)
     Asynchronous Pan/Zoom: none
     WebGL 1 Driver WSI Info: EGL_VENDOR: Google Inc. (adapter LUID: 000000000000dc6c)

EGL_VERSION: 1.4 (ANGLE 2.1.0.f474fbb607e0) EGL_EXTENSIONS: EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_d3d_texture_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_ANGLE_keyed_mutex EGL_ANGLE_surface_orientation EGL_ANGLE_direct_composition EGL_NV_post_sub_buffer EGL_KHR_create_context EGL_EXT_device_query EGL_KHR_image EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_get_all_proc_addresses EGL_KHR_stream EGL_KHR_stream_consumer_gltexture EGL_NV_stream_consumer_gltexture_yuv EGL_ANGLE_flexible_surface_compatibility EGL_ANGLE_stream_producer_d3d_texture EGL_ANGLE_create_context_webgl_compatibility EGL_CHROMIUM_create_context_bind_generates_resource EGL_CHROMIUM_sync_control EGL_EXT_pixel_format_float EGL_KHR_surfaceless_context EGL_ANGLE_display_texture_share_group EGL_ANGLE_create_context_client_arrays EGL_ANGLE_program_cache_control EGL_ANGLE_robust_resource_initialization EGL_EXTENSIONS(nullptr): EGL_EXT_client_extensions EGL_EXT_platform_base EGL_EXT_platform_device EGL_ANGLE_platform_angle EGL_ANGLE_platform_angle_d3d EGL_ANGLE_device_creation EGL_ANGLE_device_creation_d3d11 EGL_ANGLE_experimental_present_path EGL_KHR_client_get_all_proc_addresses

     WebGL 1 Driver Renderer: Google Inc. -- ANGLE (AMD Radeon(TM) R7 Graphics Direct3D11 vs_5_0 ps_5_0)
     WebGL 1 Driver Version: OpenGL ES 2.0 (ANGLE 2.1.0.f474fbb607e0)
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     WebGL 1 Extensions: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_frag_depth EXT_sRGB EXT_shader_texture_lod EXT_texture_filter_anisotropic EXT_disjoint_timer_query OES_element_index_uint OES_standard_derivatives OES_texture_float OES_texture_float_linear OES_texture_half_float OES_texture_half_float_linear OES_vertex_array_object WEBGL_color_buffer_float WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_depth_texture WEBGL_draw_buffers WEBGL_lose_context
     WebGL 2 Driver WSI Info: EGL_VENDOR: Google Inc. (adapter LUID: 000000000000dc6c)

EGL_VERSION: 1.4 (ANGLE 2.1.0.f474fbb607e0) EGL_EXTENSIONS: EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_d3d_texture_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_ANGLE_keyed_mutex EGL_ANGLE_surface_orientation EGL_ANGLE_direct_composition EGL_NV_post_sub_buffer EGL_KHR_create_context EGL_EXT_device_query EGL_KHR_image EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_get_all_proc_addresses EGL_KHR_stream EGL_KHR_stream_consumer_gltexture EGL_NV_stream_consumer_gltexture_yuv EGL_ANGLE_flexible_surface_compatibility EGL_ANGLE_stream_producer_d3d_texture EGL_ANGLE_create_context_webgl_compatibility EGL_CHROMIUM_create_context_bind_generates_resource EGL_CHROMIUM_sync_control EGL_EXT_pixel_format_float EGL_KHR_surfaceless_context EGL_ANGLE_display_texture_share_group EGL_ANGLE_create_context_client_arrays EGL_ANGLE_program_cache_control EGL_ANGLE_robust_resource_initialization EGL_EXTENSIONS(nullptr): EGL_EXT_client_extensions EGL_EXT_platform_base EGL_EXT_platform_device EGL_ANGLE_platform_angle EGL_ANGLE_platform_angle_d3d EGL_ANGLE_device_creation EGL_ANGLE_device_creation_d3d11 EGL_ANGLE_experimental_present_path EGL_KHR_client_get_all_proc_addresses

     WebGL 2 Driver Renderer: Google Inc. -- ANGLE (AMD Radeon(TM) R7 Graphics Direct3D11 vs_5_0 ps_5_0)
     WebGL 2 Driver Version: OpenGL ES 3.0 (ANGLE 2.1.0.f474fbb607e0)
     WebGL 2 Driver Extensions: GL_ANGLE_client_arrays GL_ANGLE_depth_texture GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_lossy_etc_decode GL_ANGLE_multiview GL_ANGLE_pack_reverse_row_order GL_ANGLE_program_cache_control GL_ANGLE_request_extension GL_ANGLE_robust_client_memory GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_ANGLE_texture_usage GL_ANGLE_translated_shader_source GL_CHROMIUM_bind_generates_resource GL_CHROMIUM_bind_uniform_location GL_CHROMIUM_color_buffer_float_rgb GL_CHROMIUM_color_buffer_float_rgba GL_CHROMIUM_copy_compressed_texture GL_CHROMIUM_copy_texture GL_CHROMIUM_sync_query GL_EXT_blend_minmax GL_EXT_color_buffer_float GL_EXT_color_buffer_half_float GL_EXT_debug_marker GL_EXT_discard_framebuffer GL_EXT_disjoint_timer_query GL_EXT_draw_buffers GL_EXT_frag_depth GL_EXT_map_buffer_range GL_EXT_occlusion_query_boolean GL_EXT_read_format_bgra GL_EXT_robustness GL_EXT_sRGB GL_EXT_shader_texture_lod GL_EXT_texture_compression_dxt1 GL_EXT_texture_compression_s3tc_srgb GL_EXT_texture_filter_anisotropic GL_EXT_texture_format_BGRA8888 GL_EXT_texture_norm16 GL_EXT_texture_rg GL_EXT_texture_storage GL_EXT_unpack_subimage GL_KHR_debug GL_NV_EGL_stream_consumer_external GL_NV_fence GL_NV_pack_subimage GL_NV_pixel_buffer_object GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_EGL_image_external_essl3 GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth32 GL_OES_element_index_uint GL_OES_get_program_binary GL_OES_mapbuffer GL_OES_packed_depth_stencil GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_surfaceless_context GL_OES_texture_float GL_OES_texture_float_linear GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_array_object
     WebGL 2 Extensions: EXT_color_buffer_float EXT_texture_filter_anisotropic EXT_disjoint_timer_query OES_texture_float_linear WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context
     Direct2D: true
     Off Main Thread Painting Enabled: true
     DirectWrite: true (10.0.17134.376)

     GPU #1
     Active: Yes
     Description: AMD Radeon(TM) R7 Graphics
     Vendor ID: 0x1002
     Device ID: 0x1313
     Driver Version: 21.19.128.4
     Driver Date: 9-3-2016
     Drivers: aticfx64 aticfx64 aticfx64 amdxc64 aticfx32 aticfx32 aticfx32 amdxc32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64
     Subsys ID: 36a017aa
     RAM: 1024

   GPU #2

     Diagnostics
     ClearType Parameters: Gamma: 2.2 Pixel Structure: BGR ClearType Level: 100 Enhanced Contrast: 300
     AzureCanvasAccelerated: 0
     AzureCanvasBackend: direct2d 1.1
     AzureContentBackend: direct2d 1.1
     AzureFallbackCanvasBackend: skia
     ClearType Parameters: Gamma: 2.2 Pixel Structure: BGR ClearType Level: 100 Enhanced Contrast: 300

     Decision Log
     DIRECT2D: disabled by default: Disabled by defaultavailable by user: Enabled via gfx.direct2d.disable

Toad-Hall,

In Safe Mode, the following was observed:

Inbox Message Listing: Very small font size

Open Message: Combination of small and readable font size

Reply to or forward message: Message readable font size

Hope this helps to determine my problem.

mikeandsylvia

What setting are you using in this location: View -> Message Body As Are you using 'Original HTML' or 'Simple HTML' or 'Plain Text' ?

If you select each one, what difference does it make (if any) to the text in received email.