Silico supports multiple ways to source and use data within your projects, one of these is the DataTable element. As an element, DataTables are an inline place to store data, suitable for either adhoc or small experiments. For more robust handling of data, please see Silico Sync and Data Workspace documentation.
You can add a DataTable to your project, as another other element, by using the right-click menu, or by using the keyboard shortcut 'd'. Double-click on the DataTable element to step inside. Once inside, you can add additional columns to the table using the + button.
The simplest way to populate a datatable is to copy and paste from a spreadsheet, with pasting multiple columns supported. Note that DataTables follow the time settings of your project, so make sure the rows in your spreadsheet correspond with the time steps of your project.
Once you've populated your DataTable, you can refer to its columns from other elements using the arrow syntax, e.g. "DataTable1"->"Column 2".