> ## Documentation Index
> Fetch the complete documentation index at: https://doc.lucidworks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# App Studio 4.1.2 Release Notes

[localhost link]: http://localhost:3000/docs/4/app-studio/release-notes/4.1.2-release-notes

[mintlify link]: https://doc.lucidworks.com/docs/4/app-studio/release-notes/4.1.2-release-notes

[old doc.lw link]: https://doc.lucidworks.com/app-studio/4.2/972

**Release date:** 17 December 2018

**See also the [Fusion AI 4.1.2 release notes](/docs/4/fusion-ai/release-notes/4.1.2-release-notes).**

## New features

No new features were introduced in this release.

## Improvements

* The `facet:dropdown` tag now supports multi-selection with a new `select` attribute that takes one of these values:

  * `toggle` (default)

    Allow exactly one filter to be selected at a time, but show unselected filters and counts.
  * `multiselect`

    Allow selection of multiple filters that are combined with a logical disjunction (OR). Show an "Apply" button at the bottom of the dropdown, which is enabled if and only if one or more checkboxes have been ticked.
  * `multiselect-instant`

    Select multiple filters that are combined with a logical disjunction (OR). Filters are applied immediately when a checkbox is ticked.

* The [`geo:highmaps` tag](/docs/4/app-studio/reference/tags/lightning.directive.geoHighmaps) now support an `options` attribute that you can use to specify configuration options.\
  For a complete list of available options, see the [Highmaps JS Options Reference](https://api.highcharts.com/highmaps/).