Centering the product title on the product page

You need to edit the file show of the view product via the menu Display->Views.
There, you need to move the block of code to display the product name from the top area to the left area.

If you think that you can do what you want with CSS, then, you can edit the hikashop CSS via the interface we provide in the config under the tab display in the CSS area.

I was talking about the file show of the view product via the menu Display->Views.
You would have to move the code:
<span id="hikashop_product_name_main" class="hikashop_product_name_main">
<?php
echo $this->element->product_name;
?>
</span>
after the line:
<div id="hikashop_product_left_part" class="hikashop_product_left_part">