octaeder

The list is sorted, so the last two docs used are at top. And when you look closely you may note that the second line (with the previous doc) is...

What should Ctrl+Tab do in the list? Moving to doc 8 in your example can be done with the cursor down. And then going back to doc 2 only needs...

duplicate, s. #2677

a quick and dirty try:   I could look deeper into it.

new option "Internal Viewer Location" with combobox (values Left, Right (default), Top, Bottom):  Currently a change of the option needs a restart to take effect. Is this ok?

Another way to insert labels is main Menu LaTeX/Cross References/ref. As I can see the presented combo box offers all labels.

It seems that I can't reproduce with Win10. Root document is open and I see the two subfiles in the list of hidden files:  The context menu shows this:...

Note: From scratch this issue is reproducible. When you continue editing this mismatch can disappear. This may indicate some internal representation error when the `$$` env is inserted.

maybe another time or someone else can reproduce

Since I see this very often I give it a second try. Three notes: When you type `$`, then `\sin(x)` then `$` everything seems to be fine. By removing `\sin(x)`...