Hello,
I don't see how "checkboxes" in a list would make the selection of related products ; specially when a store can have thousand of products and the namebox system has been design to handle such kind of massive amount of data.
Can you please clarify ?
Regarding the feature to make the box bigger, it's already in the list of improvements for the namebox system ; but since it's a complex JavaScript task, I'm the one assigned to it and I already a lot to do (for my components and HikaShop too) so I cannot provide any schedule for an implementation.
Please note that when you press the "ctrl" key and you click on an item in the namebox, it select it but it do not close the box which allow you to select more item faster.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.