If you have only one nav and you want to change it, you should change your variables.less: @navbar-height
(somewhere near line 265, I can't recall how many lines I added to mine).
This is referenced by the mixin .navbar-vertical-align
, which is used for example to position the "toggle" element, anything with .navbar-form, .navbar-btn,
and .navbar-text
.
If you have two navbars and want them to be different heights, Minder Saini's answer may work well enough, when qualified further by an , e.g., #topnav.navbar
but should be tested across multiple device widths.