My computer is 4k display and the tab font is too tiny now. How to change the size of window tab font in as shown in this picture?
The window.zoomLevel setting can be accessed using: File > Preferences > Settings and search for "zoomlevel"
VS Code Screenshot of window.zoomLevel Setting
This setting appears to zoom everything in the window, except for the top menubar.
I use a zoomLevel of 0.5.
After changing it to 0.5, I reduced my setting for editor.fontSize, to avoid the fontsize in the code editor becoming too large.
An alternative to modifying window.zoomLevel in settings is to use Ctrl + and Ctrl - to modify window.zoomLevel in increments of 1.
(I don't think VS Code currently has any option to configure only the size of the font used for the tab names.)