Hello there champagnealarms. We have read your message. We try to help you.

Oke good ,what is the message in the window? What Os system on your computer do you guys use? What kind of window do you mean? Can you send me a picture?

And do you have a question about bold text?

For normal window you can choose Alt+f7. Is this possible?

https://support.mozilla.org/en-US/kb/how-change-thunderbird-layout

Greetings Firefox volunteer.

Hello there again.

If certain options as you described are not usable. Can a redirect be used? With regard to this redirection, you can use the card book extension.

https://addons.thunderbird.net/en-us/thunderbird/addon/cardbook/versions/?page=1#version-83.7

When you leave the cardbook extension tab open, the Thunderbird window can be enlarged or minimized again.

Greetings Firefox volunteer.