---
title: "Tracker 3.5 new features and functions"
canonical: "https://help.vicon.com/space/Tracker39/14058677/Tracker%203.5%20new%20features%20and%20functions"
format: markdown
---
New features including the following have been added to Vicon Tracker 3.5:

> Macro (scroll-only)
> 
> > Macro (toc)

> ℹ️ **Note**   
> ℹ️ Calibrations generated with Tracker 3.5 cannot be used in previous versions of the software.

## New hotkeys option

Location: **Help** menu > **Hotkeys**

To prevent accidental loss of tracking, you can now choose whether to use the spacebar to pause the system. To access this option along with other hotkeys, on the **Help** menu, click **Hotkeys**.

![image](media://60cbda8e-9d10-489e-9e30-57b57c5b3e02)

In the **Hotkeys** dialog box, select or clear the options as required.

## Display of third-party license information

Location: **Help** menu > **Show 3rd party licenses**

To display third party license information, on the **Help** menu, click **Show 3rd party licenses**.

A dialog box, similar to the following, is displayed. Scroll down to see license information for all relevant third-party software:

![image](media://92d87d6f-b371-4358-8ab4-0e745dd685a7)

## Lens model improvements

The lens model in Tracker has been extended to work more robustly with lenses that have a high degree of distortion.