Increse minimun logo size when header shrink at scrolling

You want to have a different ratio than 1/2 – then look for having a child theme solution :
read the whole topic – but the two values to insert to the avia-sticky-header-script.js could be determined by: https://kriesi.at/support/topic/shrinking-of-header-amount-an-info/#post-1044887
example on that page is start on 100px – after shrinking the header-height should be: 40px …
PS: in the meantime ( enfold 5.4.1) it is line 78 and 91 to change

if you want to preserve the 1/2 ratio but only want to have a different logo height – you can set a different calculation on the same js – file on the line:

logo.css({'maxHeight': newH + 'px'});