Fix / tweak "back" button

Important! For the back button to work, you need to  select the default portfolio page in the Theme Customize > Portfolio section.

If you want to replace that button with an "x" sign, paste this code inside the dedicated area for  Custom CSS Code under the Theme Options Panel:

.single-portfolio .post-nav .btn-close svg {
    display: block;
}
.post-nav .btn-close {
    font-size: 0px;
    left: 50%;
    margin-left: -30px;
    position: absolute;
    top: 48px;
}
@media all and (max-width:520px) { 
     .post-nav .btn-close {
         top: 28px !important;
     }
}

If you need to hide the 'back to all projects' arrows use this snnippet code:

.post-nav { display: none !important; }