Read on for more details.
First off, we have eliminated open ellipses and splines from the toolbox. These were confusing to many people, as the closed form of these entities was far more useful. These entities will now be created as "closed" by default now.
If you want to turn your previously open entities into closed ones, just select the entity, right-click on it, and choose "Edit Geometry" from the pop-up menu. You will then be able to pick the closed form for the entity from the drop down list as shown below.
Next, we have added a bunch of new information to the parallelogram and ellipse Edit Geometry dialog box. You can now see the center point, height, and width of these entities, as shown here.
Finally, we have added a new feature which allows you to turn a parallelogram into a rectangle. It can be easy to accidentally tweak a corner of a rectangle the wrong way, skewing it. Just right-click on the parallelogram, and choose "Make Rectangular".
The parallelogram will be turned into a rectangle occupying the same area.