---
title: "Tracker 3.5 new features and functions"
canonical: "https://help.vicon.com/space/Tracker310/13929746/Tracker%203.5%20new%20features%20and%20functions"
format: markdown
---
New features including the following have been added to Vicon Tracker 3.

> 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://b5582b04-dafd-457c-a4c7-a18c8240feca)

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://269cebd4-6640-47ec-8515-db42342cdfce)

## Lens model improvements

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