The command Modify Ribs is used to create or edit any Ribs in the solid to be printed. Ribs have usually a structural support function but they can be also used for other purposes.
Ribs are usually imported with the project but they can also be drawn directly using Icarus. In the following examples we will show how to define a new Rib directly in Icarus environment.

When selecting "Modify Ribs" the first step to create a new one is by clicking "Add" and drawing a line. It may be necessary to alter an existing rib, this can be done by clicking "Edit".

By clicking the "Parameters" button, at the bottom of the Modify Ribs group (on the left), a window will open on the right. This windows "Ribs" allows to modify the specific rib selected without modifying all the ribs settings.