> Portal Navigation: > > - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version. > - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages). > - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`). > - Top-level index of all portals: https://dev.wix.com/docs/llms.txt > - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt ## Resource: $w ## Namespace: panel-slider ## Article: Introduction ## Article Link: https://dev.wix.com/docs/velo/velo-only-apis/$w/panel-slider/introduction.md ## Article Content: # Introduction Panel sliders offer site creators a way to input a number by sliding a "handle" one way or the other along a track. You can set the range of values for the slider and also its default value.
__Important:__ This element is available only in [custom panels](https://support.wix.com/en/article/wix-blocks-designing-custom-panels-for-your-widgets-action-bar-buttons) built in Wix Blocks. [Wix Blocks](https://support.wix.com/en/article/wix-blocks-check-out-our-articles) is an editor for building Wix apps.