---
title: "Interface"
url: "https://help.maxon.net/zbr/en-us/Content/html/zbrushcore/reference-guide/preferences/interface/interface.html"
section_path: "ZBrushCore > Reference Guide > Preferences > Interface"
description: "The Button Size slider affects the size of interface items. Setting the slider to a higher value will increase the size of buttons, switches and so on …"
---

# Interface

![ZCore-Prefs-Interface](https://help.maxon.net/zbr/en-us/Content/Resources/Images/ZCore-Prefs-Interface.jpg)

## ![blob](https://help.maxon.net/zbr/en-us/Content/Resources/Images/Button.png) **UI**

### Buttons Size

The Button Size slider affects the size of interface items. Setting the slider to a higher value will increase the size of buttons, switches and so on. However, note that the text on the buttons does not increase in size. After setting the slider it is necessary to restart ZBrushCore before the change will take effect.

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## ![blob](https://help.maxon.net/zbr/en-us/Content/Resources/Images/Button.png) **Palettes**

### Auto Collapse

If the Auto Collapse switch is turned on, ZBrushCore attempts to keep all palettes visible in the Left and Right Trays. If space is needed to accommodate a newly-expanded palette then other palettes will be automatically collapsed.

With the switch turned off, all palettes will remain expanded unless you close them by clicking on their title bars. You can access the palettes by sliding the tray panels up or down – the cursor will changed to a double-arrow.

### One Open Subpalette

With the One Open Subpalette switch turned on, any open sub-palette will be closed whenever a new one is opened. This can help with navigating the palette by reducing up and down scrolling. However, holding Shift when clicking a sub-palette name will mean that other sub-palettes remain open.

Turn this option off to have sub-palettes remain open until you click them closed.

### Left Tray

If the Left Tray Auto Collapse button is pressed, only one palette can be expanded at a time in the Left Tray. When another palette is expanded, other open palettes automatically collapse.

### Right Tray

If the Right Tray Auto Collapse button is pressed, only one palette can be expanded at a time in the Right Tray. When another palette is expanded, other open palettes automatically collapse.

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## ![blob](https://help.maxon.net/zbr/en-us/Content/Resources/Images/Button.png) **UI Groups**

### Use UI Groups

Some sub-palettes, such as this Preferences>Interface sub-palette, have been divided into further sections or UI Groups. These sections operate in much the same way as the sub-palettes. Turning off the Use UI Groups switch will remove the sections.

### AutoClose UI Groups

With the AutoClose UI Groups switch turned on, any open section will be closed whenever a new one is opened. This can help with navigating the sub-palette by reducing up and down scrolling. However, holding Shift when clicking a section name will mean that other sub-palettes remain open.

Turn this option off to have sections remain open until you click them closed.