When you want to choose a product or a customer for a sale order you have a drop down list where you can see a 'Search More' option which is available only if the objects number in the list exeeds a certain number.

Is there any way to make the option 'Search More' visible by default even if there is only one object (customer, product etc) in the list ?

More generally, is there a way to control the required number of objects in the list, in order to show the 'Search More' option?