---
title: "Load large trials"
canonical: "https://help.vicon.com/space/Nexus212/11243056/Load%20large%20trials"
format: markdown
---
To facilitate working with very large unprocessed data files, you can choose which files will be loaded (.x2d camera data and/or .x1d analog data), and how many frames of the trial are loaded.


**To work with large trial data:**


1. In the **Communications** window, at the top right of the **Data Management** tab, click **Show Trial Loading Options** > Macro (inline-media-image)

.
2. To select only required frames, in the **Raw Data Loading Options** area, select **Load Frames From** and type the frame to start from in the first box and the end frame in the second box.
3. If required, choose whether to load both centroid/grayscale data (X2D) and raw analog data (X1D) files, or only one of these options.
4. Process the file(s) as normal.

Only the selected range and files are processed.