Variable: tab-bar-truncate
tab-bar-truncate is a variable defined in xdisp.c.
Value
nil
Documentation
Non-nil means truncate tab-bar and show only one line.
Probably introduced at or before Emacs version 31.1.
Source Code
// Defined in /usr/src/emacs/src/xdisp.c
DEFVAR_BOOL ("tab-bar-truncate", tab_bar_truncate,
doc: /* Non-nil means truncate tab-bar and show only one line. */);