# Timelines A timeline consists of a list of items, and a list of clips. Items represent the creation of an emitter, while clips represent other actions, such as deleting particles. Although clips are not well understood, the are probably used for things such as hiding a vfx when a weapon is sheathed. ## Clips Clips must be triggered from items using the `ClipNumber` parameter. Usually, items which trigger clips will have `EmitterIndex = -1`. Items are also where emitters are attached to binders and effectors using `BinderIndex`, `EmitterIndex`, and `EffectorIndex`. Items which were originally used for a cutscene or background will usually have `BinderIndex = -1`, which will cause them to not be rendered on player characters, so creating a binder and setting `BinderIndex = 0` can fix this. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://xiv.dev/game-data/visual-effects/timelines.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.