The help panel has been expanded with a section of instruction videos that will help you use Deckplanner.
The Mark-up tool has been expanded with lines. Click the Draw-Line icon on the top-left side of the viewport to toggle line-mode. Lines drawn can be edited by clicking the edge or edgepoints on the line, and you can use the snap functionality to constrain the line with the Shift key.
Area drawings now have the option to show various icons.