It seems that the width of the Structures panel is always reset to default width everytime I reopen TexStudio. It used to remember the setting and the problem seems to start from ver 2.12.0. I tried on latest 2.12.2, still not working.
Posted several days ago and was told "This has already been fixed [bugs:#2015]." Sorry, I don't know how to reply there, so I start a new thread.
Note this bug is different from bug #2015. For vers 2.12.2, it saves the setting whether I open or close the Structure panel. However, it doesn't save my width setting of the panel and always resets to the default width setting when I reopen TXS.
You were right. Fixed: hg 6423 (6dcf46e444f5)