Hi, it should be possible, please let me know which template you talked? 🙂
If you talk the tempalte “Custom Grid”,
Please login wp-admin, go to Appearance / Theme Options / Custom Css
Paste the style code to Custom Css:
.grid-item-cate-a {
position: relative; padding: 0 5px;
}
.grid-stack-item .grid-item-cate-a:after {
content: '';
position: absolute;
right: -3px;
top: 50%;
width: 1px;
height: 1em;
margin-top: -.5em;
background-color: currentColor;
}
.grid-stack-item .grid-item-cate-a:last-child:after {
display: none;
}