The "Delete" option of the "Materials" menu allows the user to delete already existing materials. When the user clicks on this option, the following tab will be presented:

Figure 1. "Delete Material" tab

The user needs to select the material to delete in the "Select material to delete" dropdown menu. The properties of the selected material, that is, the material color and the Epsilon/Mu values, will be shown in this tab. If the user wants to delete the selected material, they only need to click the "Delete" button. Note the material deletion cannot be undone.