Hi there,
both of those buttons are actual menu items – to change the Titles / URLS go to Customizer > Menus and edit the primary menu.
The button styling is achieved with this CSS found in Customizer > Additional CSS:
/* online classes menu button */
.main-navigation:not(.slideout-navigation) .main-nav li.online-button a {
background-color: rgba(178, 139, 178, 1.0);
color: #ffffff;
border: 0;
line-height: 40px;
padding: 0px 24px;
border-radius: 50px;
margin-left: 20px;
transition: all 0.5s ease 0s;
}
.main-navigation:not(.slideout-navigation) .main-nav li.online-button a:hover {
background-color: rgba(178, 139, 178, 0.8);
color: #ffffff;
transition: all 0.5s ease 0s;
}
/* studio classes menu button */
.main-navigation:not(.slideout-navigation) .main-nav li.studio-button a {
background-color: rgba(132, 140, 183, 1.0);
color: #ffffff;
border: 0;
line-height: 40px;
padding: 0px 24px;
border-radius: 50px;
margin-left: 30px;
transition: all 0.5s ease 0s;
}
.main-navigation:not(.slideout-navigation) .main-nav li.studio-button a:hover {
background-color: rgba(132, 140, 183, 0.8);
color: #ffffff;
transition: all 0.5s ease 0s;
}