JimmyTheBroker wrote:closeall.tab file?
[activetabs] ?
I honestly tried to find information about these, but haven't had any luck.
I wondered too. However...
Look in help under "Folder tabs". In the description of the tabs context menu, it describes how to save tabs to file, and how to load tabs from a file. So files can contain a tab configuration. And users create these files, either by saving tabs to a file, or by writing such a file directly. Either way, one gives the name one wants to the resulting file.
In this case, closeall.tab is a file which the user writes, and it is simply a file which describes tabs. Since it is a user-created file, its name is not going to be found in the help file. And you can use some other name for this file, if you wish.
Also, if you experiment with "save tabs on both sides to file", and then examine the content of the resulting file, one will see that it has
[activetabs] setting off the section with tabs in the active TC panel, and [inactivetabs] setting off the section with tabs in the other TC panel.