The best way to create a Figure with desired data is to select x and y data columns in Table and use
Create Figure in Table context menu.
There are different ways to add data to existing Figure:
Add to Selected Axes sub-menu. All currently opened Figures are listed in this sub-menu.
Figure Properties window and go to
Axes Properties → Components tab. Here you can select the Table in the project tree and press
Add to Axes button.
You also can add Fit Curves or Fit Sum from Fit Plot to Figure.
To change Curves drawing order and legend entries order open
Figure Properties dialog and go to
Axes Properties → Components tab. Drag rows in table to reorder. You can also use
Down buttons or press Alt + up/down keys (Option + up/down keys on Mac) to move selected row in table up or down.