Right section is page content that you can edit it via Page Builder, Go to Pages and edit Home page


Or in your site front page, in the admin bar find Edit Page ( Back-end Editor ) or Edit with WPBakery Page Builder ( Front-end Editor )


This is Gallery and Instagram element, you can find and edit it in Page Builder with ease.
For changing Logo go to Theme Options > Header > Logo


For changing size and margin, go to Theme Options > Header > Fixed Side > Logo element
For editing or removing Back to Top or Quick Contact items go to Theme Options > Footer > More


Instead Quick Contact also you can create any page and assign it.
For changing Copyright text go to Theme Options > Footer > Bottom of Footer > Icon and Text Element
For editing menus items go to Appearance > Menus


For editing menu navigation settings go to Theme Options > Header > Fixed Side > Menu Element


And for styling menus go to Theme Options > Header > Fixed Side > Menu Styles of this Row
for editing the Social Icons go to Theme Options > Header > Social Icons


you can set the hover FX and styling the icons via options and Stylekits there


For changing  margin (Position), go to Theme Options > Header > Fixed Side > Social
Photography