--- title: "Preferences parameters" canonical: "https://help.vicon.com/space/Evoke15/10322344/Preferences%20parameters" format: markdown --- On the **User** tab in the **Preferences** dialog box (**Settings** menu > **Preferences**), you can view and/or change the following settings. > Macro (scroll-only) > > > Macro (toc) > Macro (scroll-pagebreak) ## Folders section > Macro (scroll-tablelayout) | **Option** | **Description** | | --- | --- | | **Calibration Objects** | Specifies where Evoke and other Vicon software saves all custom calibration objects. This does not include the standard calibration wand objects, which can be found in: *C:\Program Files\Vicon\Evoke1.#\CalibrationObjects* Files in this folder are VSKs. Default location: *C:\Users\Public\Documents\Vicon\CalibrationObjects* | | **Objects** | Specifies where Evoke saves all exported objects from the Tracking panel. Files in this folder are VSKs. Default location: *C:\Users\Public\Documents\Vicon\Objects* | | **Prop Meshes** | Specifies the folder Evoke opens when loading a prop mesh. Files in this folder are FBXs. Default location: *C:\Users\Public\Documents\Vicon\PropMeshes* | | **Scene Meshes** | Specifies where scene meshes (FBX files) are located. Default location: *C:\Users\Public\Documents\Vicon\SceneMeshes* | | **Retargets** | Specified where retargets (VSR files) are located. Default location: *C:\Users\Public\Documents\Vicon\Retargets* | | **Skins** | Specifies where skins (FBX files) are located. Default location: *C:\Users\Public\Documents\Vicon\Skins* | | **Smart Object Templates** | Specifies where Smart Object templates are located. Default location is: *C:\Users\Public\Documents\Vicon\SmartObjectTemplates.* | > Macro (scroll-pagebreak) ## General section > Macro (scroll-tablelayout) | **Option** | **Description** | | --- | --- | | **Alt key to select in views** | When selected, holding down the ALT key enables you to:
- Draw a box with the left mouse button in 2D and 3D views to multi-select centroids, markers, or objects - Draw a box with the right mouse button in Graph Plots to zoom in on a range of data
Default: Selected | | **Middle mouse button scrub in 2D & 3D views** | When selected, holding the middle mouse button and dragging left or right enables you to scrub backward and forward through review data. Default: Selected | | **Middle mouse button scrub sensitivity** | Controls the sensitivity of the cursor when used for scrubbing with the middle mouse button. Default: 5 | | **Mouse wheel jog in 2D & 3D views** | Controls the increment of frames progressed (forward or backward) when using the mouse wheel to scrub through review data. Default: 5 | | **Enable auto-save** | When selected, enables the system to automatically save certain configuration files. For details, see [Vicon Evoke fundamentals](https://vicon-help.atlassian.net/wiki/spaces/Evoke15/pages/10323763). Default: Selected | | **Ask before recovery of latest settings** | When selected, if Evoke is started from an unexpected shutdown, you are prompted to choose which settings to use. For details, see [Vicon Evoke fundamentals](https://vicon-help.atlassian.net/wiki/spaces/Evoke15/pages/10323763). Default: Selected | | **Auto-save interval** | Controls the interval (in seconds) in which Evoke auto-saves its configuration files. Changing this setting has no effect if **Enable auto-save** is cleared. Default: 60 seconds | | **Start playing automatically in review mode** | When selected, captures loaded in Review mode begin immediately upon loading. Default: Cleared | | **Warn if free space on optical data capture drive is low** | When selected, Evoke warns you when your current drive is below its **Optical free space warning threshold** (see below). Default: Selected | | **Optical free space warning threshold** | Controls when (in GB) the free space warning is issued. If the **Warn** option (see above) is cleared, changing this setting has no effect. Default: 50 GB | ## Update Notificationssection > Macro (scroll-tablelayout) | **Option** | **Description** | | --- | --- | | **Show notification**** for application version 1.4.1.138304h** | When selected, Evoke notifies you if an updated version of Evoke is available. For this feature to work, you must be connected to the internet. Default: Selected | | **Show notification for firmware version 725** | When selected, Evoke notifies you if your firmware is out-of-date. Default: Selected | ## Subject Storesection > Macro (scroll-tablelayout) | **Option** | **Description** | | --- | --- | | **Automatically manage smart object patterns** | When selected, a unique pattern is automatically assigned to each Smart Object, where possible. If you are tracking multiple identical objects, clear this option (for details, see [Track multiple identical objects](https://vicon-help.atlassian.net/wiki/spaces/Evoke15/pages/10324156)). Default: Selected | | **Enable object evaluation** | When selected, the system performs object evaluations in the background. For more information. see [Understand object evaluation](https://vicon-help.atlassian.net/wiki/spaces/Evoke15/pages/10326597). Default: Selected | | **Object evaluation step limit** | Maximum number of steps to allow for evaluating each object pair. Increasing this value provides more certainty that object similarities do not exist but results in decreased performance. Changing this option has no effect if **Enable object evaluation** is cleared. Default: 1000 | | **Object confusion warning threshold (mm)** | Threshold for differences between objects (in mm). This warning indicates the object either closely matches another object or another view of itself (see [Understand object evaluation](https://vicon-help.atlassian.net/wiki/spaces/Evoke15/pages/10326597)). Changing this option has no effect if **Enable object evaluation** is cleared. Default: 6.00 mm | ## Channel Cache section > Macro (scroll-tablelayout) | **Option** | **Description** | | --- | --- | | ** ****Cache Memory Limit (MB)**** ** | Sets the limit for the amount of channel data saved to memory before it is written to disk. **Note:** The path for channel data written to disk is configurable at **Preferences** > **System** > **User Data Folder** Default: 512 MB | ## Graph Plots section > Macro (scroll-tablelayout) | **Option** | **Description** | | --- | --- | | ** ****Trace colors**** ** | Controls the number of unique colors to be used for traces. You can choose between 9, 12, and 22 colors. The lower number of colors may assist those with limited color vision. Default: 22 colors | | **Enable rotation unwrapping** | When selected, angles are unwrapped when they exceed the typical (-π, π) radians range (see [Graph Plots reference](https://vicon-help.atlassian.net/wiki/spaces/Evoke15/pages/10324223)). Default: Selected | | **Show pan/scale overlay graphics** | When selected, graphics (such as the dead zone) for zoom/pan/scale will appear in the window (see [Change the scale of graphed data](https://vicon-help.atlassian.net/wiki/spaces/Evoke15/pages/10326635)). Default: Selected |