When working with 3D matrices in MATLAB, it's important to understand how to view and visualize the data effectively. Here are a few techniques that can be used to achieve this:

1. Indexing: MATLAB uses indexing to access elements within a 3D matrix. You can use the colon operator ':' to access entire rows, columns, or pages of the matrix. For example, if you have a 3D matrix 'A', you can access a specific page using the syntax A(:,:,page).

2. Visualization: MATLAB provides various functions for visualizing 3D data, such as 'imagesc' for visualizing matrix values as colors, 'slice' for creating 3D slice planes, and 'vol3d' for visualizing volumetric data. Using these functions can help you gain insights into the structure and content of your 3D matrix.

3. Plotting: Another way to view 3D matrices is by plotting the data using MATLAB's plot functions. For example, you can use the 'plot3' function to create 3D line plots, or the 'surf' function to create 3D surface plots of your matrix.

By mastering these techniques, you can effectively view and analyze 3D matrices in MATLAB, gaining valuable insights from your data.