On the left side of the workspace is the Data Tree. This is a central part of Evince that displays the objects of your project (tables, plots, models etc.) in a hierarchical way. You can expand the tree by clicking on the "+" that appears to the left of nodes that consists of at least two levels. It is also possible to perform this action by double-clicking on the node itself. By right-clicking on nodes in the tree, you will be presented with different options that allow you to work on your project. Information about selected Data Tree objects can be viewed in the Quick Information Area below the Data Tree.

Below are descriptions of various Data Tree objects. Data Tree menus can be accessed by right-clicking on the objects.

Data Tree object	Description	Symbol
Case	Each new project has a Case that holds all imported and calculated data.
DataSet	Imported data set. The DataSet is used for creating multivariate models. The DataSet can be cloned, which means that several DataSets can exist in the Case.
X and Y	Container for matrices X and Y used for calculating models.
Xtrain, Xtest, Ytrain, Ytest	Matrices holding X and Y used for creating models. If observations or variables are excluded from the DataSet, these matrices are reduced as well.
X training (transformed) Y training (transformed) X test (transformed) Y test (transformed)	Matrices holding transformed X and Y used for creating models. Transformed matrices are updated with at least one of the available transformations.
PCA and PLS model	Contains the PCA and PLS statistics.
Original data	The matrix holding the original imported data. When observations or variables are excluded from the DataSet, this matrix remains unchanged.