On this page you choose which items you want to plot. You select the items in the list "items" and press one of the arrow buttons,
to choose if they should be plotted as contour or vector items.
If you choose to calculate the contours from 1 item the "standard way", you will only have to specify 1 item in the items selection's "Contour Item(s)". On the other hand, if you choose to base the contours on the vector length, you will have to specify 2 contour items. If the file only contains 1 item, the latter option will not be available.
On this page, you are able to choose from which items the contours should be calculated, but you will specify the appearance of the contours on the Contours page.
