> ## Documentation Index > Fetch the complete documentation index at: https://docs.sprello.ai/llms.txt > Use this file to discover all available pages before exploring further. # Generating variations > Generate one result per item, or combine items into a single generation. This is the pattern that turns one workflow into a whole set of results. When an input holds **more than one item**, you decide how those items reach the generator: each on its own, or all together. That single choice is the difference between getting ten images and getting one. You make the choice with the **Each / All** toggle on the input node. Toggling an input node between Each and All mode on the Sprello canvas ## Each: one result per item In **Each** mode, every item starts its own generation. This is the default. Ten product photos become ten images; four prompts become four. The results are independent, so you can review them and keep the ones that work. An input in Each mode producing one generated result per item ## All: items combined into one In **All** mode, the items are bundled and sent together as a single generation. Use it when several inputs should shape *one* result—for example, three brand references guiding a single new image. An input in All mode sending several references into a single generation ## Which should I use? * Reach for **Each** when each item should produce its own result—generating a set, exploring options, or running one prompt across many products. * Reach for **All** when the items work together toward one result—combining reference images, or blending several inputs into a single generation. ## Mix the modes You can set one input to Each and another to All on the same generator. The **Each** input decides how many results you get; the **All** input is applied to every one of them. Ten products in Each mode, with three brand references in All mode, gives ten images—each using all three references. One input in Each mode and one in All mode feeding a single generator, producing one result per Each item ## When two sets need combining If two **independent** multi-item sources feed the same generator in Each mode, the result is ambiguous—Sprello can't tell which item should pair with which. It asks you to add a [Combinator](/concepts/combinator) to define the pairing, switch one source to All, or restructure. ## Good to know * A single node can expand to at most **500 items**. If a combination would exceed that, Sprello blocks the run and asks you to reduce inputs. * Generations run a few at a time and the rest queue, so large sets finish in waves. * Switching a source between Each and All recalculates the result count. Existing results aren't deleted—switch back and they reconnect, no re-generation needed. ## Next Pair every product with every material—or match them one to one.