How can I sort the products on my Loyverse screen?

You can add custom screens with products and arrange them in the bottom navigation.

Please read this article https://help.loyverse.com/help/how-arrange-sale-screen-loyverse

Actually, I manage to line them by adding alphabetic letters in each item like a b,c,d... I just want to know if there is any way to do it... I just want to place the active products above the moderate ones...

You can sort out the item list to show items only from one category. And if you use a tablet you can choose how to place every item and category in the sales screen. You can create up to 6 different pages with different item layouts. You should look it up is quite useful, here is a link to the help article: https://help.loyverse.com/help/how-arrange-sale-screen-loyverse

Also this is the video:

I want to arrange my items to be in specific order, but I cannot rearrange them, how do I go about?

Hello,

Now Loyverse has only alphabetical order for items.
But, if you want to change the order of items you need to add in the name of the item the digits in the beginning of the name.

Something like 

1.     "1 banana"

2.     "2 apples"

and so on. 

If you are using Ipad or Android tablet you can arrange the items in the sales screen as you wish.

You can read all details on how you can arrange the sales screen in tablets in this link: https://help.loyverse.com/help/how-arrange-sale-screen-loyverse

I hope this helps 🙂