If you click on a selected line frame while pressing [Ctrl] (or right-click) to open a context menu, you will see the following context menu:

However, most functions which are offered in this context menu,
are also available in the menu bar of iCalamus. The only menu item of
interest here for simple lines is Path
, which offers the
following options:
Close Path(see below).
openwhich means that its start point and its end point are not identical. When you choose this function, an additional vector line will be drawn from the current end point to the start point. This way you will quickly get a closed vector path. In almost all cases this changes the visual line into a visual shape.
If you have selected a frame with a dynamic shape, a Shape
submenu will be offered instead, with the following options:
Shapeschapter of the Objects menu.
Shapeschapter of the Objects menu.