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Message pane scroll bar is missing on macOS Big Sur

  • 6 replies
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  • Last reply by Matt

davidcpellegrini
davidcpellegrini

I installed version 91.1.2 of Thunderbird. When I open a message that has text longer than the window size, there is no scroll bar to see the rest of the message. Only if I hit the up or down arrows does the scroll bar appear, briefly.

I'm on macOS Big Sur version 11.6

David

I installed version 91.1.2 of Thunderbird. When I open a message that has text longer than the window size, there is no scroll bar to see the rest of the message. Only if I hit the up or down arrows does the scroll bar appear, briefly. I'm on macOS Big Sur version 11.6 David

Chosen solution

I set "Show scroll bars" to "Always" but it had no immediate effect. I quit TB and restarted, and now it works. Thanks for the tip. David

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All Replies (6)

Charles218
Charles218

I am having the same issue with TB 91.1.2, though I am using High Sierra. However, using your hint about the up/down arrows, I clicked on one of the arrows and the scroll bar appeared. While still holding the arrow, I clicked on the scroll bar and it stayed even after I let go of the arrow. I was able to use the scroll bar normally, though a a couple of seconds after I let go it disappeared again. This certainly isn't a permanent resolution, but it is a easy workaround until this bug is resolved.

Matt
Matt
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just a curiosity from my perspective but does 

   Click the Apple menu at the top-left of the screen.
   Select System Preferences.
   Select General.
   Under Show scroll bars, choose Always.

Do anything with this?

Edit to add... restart Thunderbird as a last step.

Modified by Matt

Charles218
Charles218

In checking the scroll setting in preferences, I see that mine is set on "Automatically based on mouse or trackpad". But just as mysteriously as this problem appeared, it has now disappeared and is functioning perfectly. I'll leave the scroll setting as is for now.

davidcpellegrini
davidcpellegrini Question owner

Chosen Solution

I set "Show scroll bars" to "Always" but it had no immediate effect. I quit TB and restarted, and now it works. Thanks for the tip. David

davidcpellegrini
davidcpellegrini Question owner

Even though I have a solution it would be nice if TB behaved properly when "Automatically based on mouse or trackpad" is selected.

Matt
Matt
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davidcpellegrini said
Even though I have a solution it would be nice if TB behaved properly when "Automatically based on mouse or trackpad" is selected.

Perhaps file a bug report. https://bugzilla.mozilla.org/ Product=Thunderbird Component= OS integration