You will find the use of data grids throughout the NinjaTrader application.
With a data grid you can:
You may want to export your execution history to Excel for further analysis as an example. Simply go to any grid displaying execution history, right click and select the "Export to Excel..." menu.
Each data grid's right click context menu will display the menu options in the above image. Depending on which data grid you are working with (Orders, Executions, Positions etc...) you will potentially see additional menu options relevant to the data you are viewing. For example, in the orders data grid, you will also see menu options for "Cancel Order" and "Cancel All Orders".
Selecting the "Grid Properties..." menu option will open a grid properties window. In this window, you can choose which columns you wish to show (make visible) and modify the display order of columns.