uncheck "match case" option of a marker item,
it will highlight nothing about that item !

double click a item in "keyboard map",
add/modify a shortcut key and press OK button,
emeditor always crazy/exception if press Close button before data write complete
(using v11 beta 2, portable version)

(assume I assign the command to F6)
if a word at cursor not in markers ==> press F6 add the word to markers
if a word at cursor in markers already ==> press F6 delete the word from markers
if has selection ==> press F6 such as above behavior, but retrieve selection rather than word at cursor
----- below is just the reason of why need ToggleMarkerAddDel command -----
for example, I need keep marker golbal vari "aa" and "bb" when I trace code,
and usually need highlight/unhighlight local vari such as "cc", "dd" or "return",
command "enable/disable all" or "delete all" can't help me.
use hotkey/shortcut key is more huge handy than mouse.

if document text is "aaa bbb ccc",
and find pattern is "[a-z]+[ ]",
it found & highlight "aaa " at first time,
and find next will be "aa " --> "a " --> "bbb " --> "bb " ...
The bug happen on both find and replace !