Opencart: when adding products, not all categories are visible (in the admin panel), what's the problem?

Question

opencart

Hello. There are 15 categories, but when I add a product, in the link section, only 5 categories are visible in the drop-down list. How to fix it?
Opencart 2.1.0.2

Answer 1

In the admin/controller/catalog/filter.php file, find the autocomplete function and change the value to the desired one prntscr.com/befpe5
But in general, it's normal that 5 categories are issued, among 15 you won't get lost. Another thing is when there are 2-3 hundreds of categories

Answer 2

In the default theme, they should not all be visible: you need to write 1-2-3 letters in the selection field and select the desired category.