How to add a contract matrix?

Contract matrices allow you to add contract data tables. For example, you can create a price-per-item matrix for different quantities where the price per item decreases as other products are ordered at once. To create a contract matrix, follow the steps below : 

1. Click Add a matrix to the Matrix tab. 
2. Indicate whether you want to use a pre-existing model or create the matrix from scratch. Give the matrix a title and, if you create a new matrix, select the size. 
3. Click Create to create the matrix, ready to fill. 
4. To fill out the matrix, click Change Values.
5. Enter a value for each field in the matrix. Click Save to submit the value and complete the matrix. Click Cancel to keep the matrix empty. Click Add a column to add another column at the end of the matrix. Click Add a row to add another row at the bottom of the matrix.