The **Solution CSS picker** is a dialog used to assign a stylesheet to the active solution. It manages which LESS file (or other stylesheets) the solution will use for its UI.\
You can access it by selecting the [`styleSheet`](/reference/servoycore/object-model/solution.md#stylesheet) property in the `Properties view` of the selected solution node in the [Solution Explorer](/reference/servoy-developer/solution-explorer.md#solution-explorer).
This picker helps maintain a clean and manageable style layer by allowing you to easily:
* Select an existing stylesheet from the media library.
* Create a new stylesheet.
* Add LESS theme support to an existing stylesheet.
## Sections
Solution CSS picker sections
### Filter Field
* Located at the top of the picker dialog.
* Allows you to type part of the stylesheet name to filter the list below.
### Stylesheet List
* Displays all available stylesheets in the media library.
* Selecting `-none-` will remove the assigned stylesheet from the solution.
### Buttons
* **Create New Stylesheet**: Opens the [Create New Stylesheet](/reference/servoy-developer/object-editors/solution-css-picker/new-stylesheet-wizard.md#new-stylesheet-wizard) wizard, a separate dialog to create a brand new LESS stylesheet file.
* **Add Less Theme Support**: Appears only if the selected `.less` file does not already have LESS theme support. Opens the [Setup a Servoy Less Theme](/reference/servoy-developer/object-editors/solution-css-picker/setup-a-servoy-less-theme-wizard.md#setup-a-servoy-less-theme-wizard) wizard, a dialog to initialize theme support on the selected stylesheet.
* **OK**: Applies the selected stylesheet to the solution.
* **Cancel**: Closes the picker without applying changes.
## Using the Solution CSS picker Wizard
Here are the steps for using the **Solution CSS picker**:
1. **Open the CSS Picker**
* In the [Solution Explorer](/reference/servoy-developer/solution-explorer.md#solution-explorer), select your solution name
* In the `Properties view`, find the [`styleSheet`](/reference/servoycore/object-model/solution.md#stylesheet) property and double click its value to open the picker.
2. **Filter Stylesheets** (Optional)
* Use the filter input at the top to quickly narrow down the list of stylesheets by typing part of the filename.
3. **Select a Stylesheet**
* Click on a stylesheet from the list to highlight it.
* If you select `-none-`, the solution will no longer use a stylesheet.
4. **Create a New Stylesheet**
* Click `Create New Stylesheet` to open a dialog where you can specify the name and location of a new LESS file in the media library.
5. **Add LESS Theme Support**
* If you select a `.less` file that does not yet support LESS themes, click `Add Less Theme Support` to initialize theme capabilities in that file.
6. **Apply or Cancel**
* Click `OK` to assign the selected stylesheet to the solution.
* Click `Cancel` to exit without making changes.
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