Cell Comment on Calc

How to turn off the auto display comment function? I don’t want to comments auto display when I open the file. It should be like Excel that display when mouseover the cell.

I know how to hide comment and save the file, but it always auto display when I open the file next time. This function always bother me to read the data on screeen.

Please take a look to this thread in libreoffice forum. Comments in Calc always showing in xlsx file

You should check this extension.
http://extensions.libreoffice.org/extension-center/shownotes

Cheers