For processing a new data set it is recommended to start with an empty workspace. Either, one of the existing workspaces is cleared with the 
button, or a new workspace is created with the 
button of a workspace tab. In this case, all configurations of the currently active workspace will be copied.
As the first thing an adequate model should be selected from the menu Pixelwise/Model or from the option list in the workspace tab.
The reason is that the different user interface elements such as the TACs to be defined are adjusted to fit the requirements of the model.
How To Continue
After the model selection, the actual data processing can start with image loading described below.