Hi,

Travelo theme has not option to change menu font size. 

We will add it soon.

Instead you can use custom css code in theme options panel to change menu font size.

#main-menu ul.menu, .chaser ul.menu { font-size: 16px; }

http://prntscr.com/ndy2j8

Regards, C-Themes

kindly advise how to change the menu font size .