chargeafter-rnd_chargeafter-plugin-for-nopcommerce/Nop.Plugin.Payments.ChargeAfter/Areas/Admin/Views/Order.cshtml
<style>
    #markorderaspaid,
    #refundorderoffline,
    #partiallyrefundorderoffline,
    #voidorderoffline,
    #btnEditOrderTotals {
        display: none;
    }
</style>