# Groups Groups are reusable shortcuts of selection. If you use multiple times the same selection of fixtures, you should probabely create a group with this selection and then call this group in cuelists, effects, carousels etc... Each group selection contains : * Action : add or remove, tells if this command add or removes element to the group * Target Type : can be fixtures or groups * ID : id of the first fixture or group * THRU : allows you to give a range of fixture or groups * Last ID : ID of the last fixture or group to select * Subfixtures : filter only some subfixtures --- # 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://norbertrostaing.gitbook.io/blinderkitten/object-types/groups.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.