Open document in tabs doesn't work

[Paul Rubin]

On 11/10/25 10:59, Yifan Liu wrote:
> Dear All,
>
> LyX opens all documents in new windows instead of tabs, despite my 
> preference setting indicating documents should open in tabs. I am 
> using LyX Version 2.4.0~RC3 on Linux Mint 22.2 Cinnamon. Thank you.
>
> Sincerely,
>
> Yifan Liu
>
Yifan,

I'm using 2.4.0-RC3 on Mint 22.2 (MATE) and have no problem with this. I 
suspect it's a matter of two different (slightly confusing) settings. In 
Tools > Preferences > Look & Feel > Document Handling > Windows & Work 
Area, the first two check boxes are "Open documents in tabs" and "Use 
single instance". The first one determines what happens when you use 
File > Open to open another document while working on an existing 
document in LyX. (If checked, the document opens as a new tab; if not 
checked, LyX starts a new instance for it.) It only affects documents 
opened by LyX. The second checkbox determines how documents opened 
outside LyX (by double-clicking an icon, or using xdg-open in a 
terminal, or something else) are handled. (If checked, they will open as 
tabs in an already running instance of LyX; if not checked, they will 
open in a new instance of LyX.)

Do you have both checked?

Paul
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