[FEATURE REQUEST] Real-time preview of font and font size change in writer and others

Can we have a feature such that when we select a section of text and try to change the font or the font size, the changes can be seen in real-time without selecting the new values?

Suppose the word LibreOffice is written in LO Writer in Liberation Serif font with font size 12. Now lets say we want to change its font and font size. For that at present we have to pull the drop down menus of font name and font size, click the values individually and see the changes.

What I’m suggesting is a feature so that we can see the above mentioned changes simply by hovering the mouse cursor over the values in the lists of the drop down menus without selecting any of them.

Actually this feature is already available in Calc, i don’t understand why it’s not in Writer…

EDIT 28/08: this feature is being asked since 2011 and there are multiple requests on Bugzilla

There appears to be a bug in Writer: Bug 95355. The actual setting is in Tools->Options->LibreOffice->View with Show preview of fonts checked. Calc appears to be working.