Sometimes you want to give your clients options. Within your line item settings, you'll be able to set quantities as well as minimums and maximums. This works great with item optionality as well as pricing ranges.
Making an Item Quantity Optional
Head into your line item settings. From there toggle on the Optional quantity option. Once you've done that, you will be able to set the minimum and maximum quantity.
Head into your line item settings. From there toggle off the Make quantity optional option.
What Your Client Sees
When your client views your quote they'll see a check button next to each optional element as well as a field to enter their units. They'll also have a slider that pops up and lets them slide between your minimum and maximum.