Variable: tab-line-new-button
tab-line-new-button is a variable defined in tab-line.el.gz.
Value
#(" + " 0 3
(keymap
(keymap (13 . tab-line-new-tab)
(tab-line keymap (touchscreen-begin . tab-line-new-tab)
(down-mouse-2 . tab-line-new-tab)
(down-mouse-1 . tab-line-new-tab)))
mouse-face tab-line-highlight rear-nonsticky nil help-echo
"Click to add tab"))
Documentation
Button for creating a new tab.
Source Code
;; Defined in /usr/src/emacs/lisp/tab-line.el.gz
(defvar tab-line-new-button
(propertize (icon-string 'tab-line-new)
'rear-nonsticky nil
'keymap tab-line-add-map
'mouse-face 'tab-line-highlight
'help-echo "Click to add tab")
"Button for creating a new tab.")