make the custom fields display in cart before checking, just like "Cart field" ?

Hi,

No there is no option to have the custom item fields editable on the checkout.
That would require the development of a custom checkout view plugin.

Hi,

You can do that with some simple CSS.
For example:
td.hikashop_product_add_to_cart_row {
width: 350px;
}
.hikashop_product_listing_custom_item, .hikashop_product_listing_custom_item_table, .hikashop_product_listing_custom_item_table tr {
display: inline;
}
.hikashop_product_listing_custom_item select {
width: 50px;
}

And that will get you that:
monosnap.com/file/tRDcEfXgFDta0Qdrn3uGqophXg9UrJ
Then, just adjust the columns width and some other CSS based on your needs so that it display properly and nicer and you'll be able to get a good one line display.
www.hikashop.com/support/documentation/1...ize-the-display.html