I may be missing something, or hallucinating, but prior to 3.5 it seemed that when I opened multiple projects they were automatically merged (“Merge all Windows” acted like a default setting for when doing this.) Now when I open multiple projects, I have to manually select the “Merge all Windows” menu command.
I recall way back when multiple projects had their own window, I was wishing for such a merging function and discovered it by accident. But I swear that ever since then merged windows happened all the time without me having to do it.
I did some looking up stuff on this online, and found there had been ways in the MacOS System Settings to make this automatic but the suggestions are several years old and the System Settings menu path has changed and it appears there’s no way to do that anymore? (Perhaps I did it that way back then but I don’t remember.)
Let me be more precise about the expected behavior.
If you open two projects, merge them, and close Scrivener, reopening Scrivener will give you those same two projects in a merged window. If you open a third project, it will not automatically merge with the other two.
That’s what I see with Scrivener 3.5 with Sequoia. If Tahoe behaves differently, it’s OS-related.
I’m not on Tahoe at the moment, but there’s a system setting to prefer tabs under Sequoia and earlier, under the “Windows” section of the “Desktop & Dock” pane. I’m assuming it’s still there under Tahoe and may need to be reset to “Always”. With that enabled (and after Scrivener is relaunched), opening additional projects should open them as a new tab in the same window.
I open one project; then another. I merge them. I close Scrivener. I run Scrivener and open one of the projects, that’s the only one opened. I open the other one that had been merged and it opens in a separate window. I’ve tried by selecting them using the ‘Recent Projects’ menu item (selecting first one, and after it’s opened, then the other), and also just File—>Open—>selecting the Project. They are not merged.
What you describe is how I recall it happening, excepting that:
If you open a third project, it will not automatically merge with the other two.
I don’t recall happening. I remember that once Scrivener has a few merged windows, any additional project also opens in another tab. I think. Yeah, pretty sure. Yeah, 'cos I recall having a bunch of tabs open with several non-fiction projects and then one of more fiction.
PS: In case anyone wonders why the setting was changed, assuming it would have retained the earlier setting from Sequoia when I upgraded to Tahoe, I didn’t change it. Due to a variety of reasons, I reset my MacBook Pro to factory settings about two weeks or so after initially upgrading to Tahoe in an attempt to resolve another problem which refused (hopefully the past tense stays that way) to go away. I think “In Full Screen” maybe the default setting?