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How do I increase the font in the Address Line "To" in a new email

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I can increase and decrease fonts all over the place, but I can't increase the font size in the address line for a new email.

I can increase and decrease fonts all over the place, but I can't increase the font size in the address line for a new email.

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There might be a simpler way to do this, but in the meantime I found some css code that works.

/* The To: email addresses */
#MsgHeadersToolbar .address-pill  {
  background-color: #336699 !important;
  color:            White   !important;
  height:           40px    !important;
  font-size: 18px !important;
}

/* The To: address "input" box (ie with cursor) */
#MsgHeadersToolbar .recipients-container input {
  border-radius:    3px     !important;
  color:            white   !important;
  background-color: #336699 !important;
  padding-inline:   2px     !important;
  font-size: 18px !important;
}


https://www.elevenforum.com/t/thunderbird-115-css-customization.16320/post-342200

Help/Troubleshooting Info, Profile Folder, Open Folder, close TB, create a new folder named chrome, create a new document in chrome with a text editor, name it userChrome.css, Save as type: All files *.*, copy in the above code, change the numbers and colours as desired. Double-click toolkit.legacyUserProfileCustomizations.stylesheets to true in Settings/General/Config. editor, restart TB.

Online css generator

video on how to create a css file (Firefox and TB)

See the attached pictures that show the effect with and without the css.