# Custom app-wide CSS
It is possible to provide a CSS file to be used regardless of the theme set by the user.

|     |     |
| --- | --- |
| ![](Custom%20app-wide%20CSS_image.png) | Start by creating a new note and changing the note type to CSS |
| ![](2_Custom%20app-wide%20CSS_image.png) | In the ribbon, press the “Owned Attributes” section and type `#appCss`. |
| ![](3_Custom%20app-wide%20CSS_image.png) | Type the desired CSS.     <br>  <br>Generally it's a good idea to append `!important` for the styles that are being changed, in order to prevent other |

## Seeing the changes

Adding a new _app CSS note_ or modifying an existing one does not immediately apply changes. To see the changes, press Ctrl+Shift+R to refresh the page first.

## Sample use cases

### Customizing the printing stylesheet

> [!TIP]
> Since v0.99.2, it's no longer possible to use `#appCss` to customize the printing CSS, since the printing is now done in an isolated environment.
> 
> However, it's still possible to customize the CSS via `~printCss`; see <a class="reference-link" href="../Basic%20Concepts%20and%20Features/Notes/Printing%20%26%20Exporting%20as%20PDF.md">Printing &amp; Exporting as PDF</a> for more information.

### Per-workspace styles

When using <a class="reference-link" href="../Basic%20Concepts%20and%20Features/Navigation/Workspaces.md">Workspaces</a>, it can be helpful to create a visual distinction between notes in different workspaces.

To do so:

1.  In the note with `#workspace`, add an inheritable attribute `#cssClass(inheritable)` with a value that uniquely identifies the workspace (say `my-workspace`).
2.  Anywhere in the note structure, create a CSS note with `#appCss`.

#### Change the color of the icons in the <a class="reference-link" href="../Basic%20Concepts%20and%20Features/UI%20Elements/Note%20Tree.md">Note Tree</a>

```
.fancytree-node.my-workspace.fancytree-custom-icon {
    color: #ff0000;
}
```

#### Change the color of the note title and the icon

To change the color of the note title and the icon (above the content):

```
.note-split.my-workspace .note-icon-widget button.note-icon,
.note-split.my-workspace .note-title-widget input.note-title {
    color: #ff0000;
}
```

#### Add a watermark to the note content

<figure class="image image-style-align-right image_resized" style="width:39.97%;"><img style="aspect-ratio:641/630;" src="1_Custom app-wide CSS_image.png" width="641" height="630"></figure>

1.  Insert an image in any note and take the URL of the image.
2.  Use the following CSS, adjusting the `background-image` and `width` and `height` to the desired values.

```
.note-split.my-workspace .scrolling-container:after {
    position: fixed;
    content: "";
    background-image: url("/api/attachments/Rvm3zJNITQI1/image/logo.png");
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    width: 237px;
    height: 44px;
    bottom: 1em;
    right: 1em;
    opacity: 0.5;
    z-index: 0;
}
```

## Limitations

Some parts of the application can't be styled directly via custom CSS because they are rendered in an isolated mode (shadow DOM), more specifically:

*   The slides in a <a class="reference-link" href="../Collections/Presentation.md">Presentation</a>.