Pinned tabs
If you'd like an editor tab to always be visible, you can pin it to the editor tab bar
You can pin an editor tab from either the context menu or using the command View: Pin Editor (⌘K ⇧Enter).
同じショートカットキーでUnpin
Pinned tabs always appear first before non-pinned tabs.
settings: workbench.editor.pinnedTabSizing
https://youtu.be/6NFR5MsHM_4?si=DAPyXFlcbdnSqPsT