hi every one, the wavy underlines for spell check is very large (my opinion) and i want change size, color and other styles but cant find any option to do this !
in bellow picture can see different between the MS office office style with LibreOffice
i think MS office style is more comfortable but something like my opinion is best for me .
If you find that it interferes with the flow of thought for you, you can turn off the automatic spell checking while you work then run a spell check afterwards. Uncheck Tools > Automatic spell checking (Shift+F7)
You can also set the language for your Lorem ipsum paragraphs/words to Latin (or to None to turn off spell check for that text).
The point of the underlining is to make potential spelling errors obvious, to make it easy to correct; not to hide them amongst the text.
Hello,
the color can be changed through Tools -> Options -> LibreOffice -> Application Colors in section General set the desired color of AutoSpellcheck (Requires a reload of the document).
I'm not aware of any method to change the wavy appearance, which seems to be **not** a matter of LibreOffice but the underlying spellchecking library (which is *hunspell* in case of Linux systems). My Firefox browser shows the same wavy underlines doing a typo while editing this answer.
Hope that helps.
In my Firefox under Linux, I get a red dotted underline, not a wavy one. Thus, the application is likely responsible for the appearance, but I think this look is hard-coded.
I’m under Linux as well and it is wavy in my Firefox just like in LibreOffice on Linux.
My distro is Fedora with KDE Plasma desktop. Could it then be it is handled by the widget library? But I don’t know if Firefox overrides the desktop widget. Here it is Qt while it is GTK+ for Gnome and derivatives.
any method to change the wavy appearance,
Why, there is always one: hack the code and make your own build.
Thanks for your contribution of the obvious.
Your answer implied that you did not know that.
hack cod is latest way if there isn’t another way. 
changing color for in correct words is a good idea ( but it isn’t a answer to my question) i think this option is missing in LibreOffice!