# Font tab

Learn how to customize font settings for null values, locked cells, and selected cells in the Sheet Settings dialog with Spread.NET.

## Content

The **Font** tab of the **Sheet Settings** dialog provides the font settings that apply to null values and locked or selected cells.
![image](https://cdn.mescius.io/document-site-files/images/e31400f0-03a3-4cfc-a80d-08d62bed05a8/image.1067a7.png?width=650)
This tab provides the following items:

| **Sheet Settings** | **Description and Reference** |
| -------------- | ------------------------- |
| NullFont | Sets the font for null values. |
| LockFont | Sets the font for locked cells. |
| SelectionFont | Sets the font for selected cells. |