Similarly a highlighted curve is painted white with white symbols at the grid points and a selected curve has a spherical icon near the middle. Highlighting is used when the user needs to flag a single entity for performing operations such as grided functions. Selection can be applied to multiple entities. After an entity is highlighted, it can be selected by clicking on the Select button. Another entity can then be highlighted and selected subsequently.
Selection is used when the user needs to flag multiple entities for performing further operations.
Selection of an unblanked entity can also be achieved by holding down the Ctrl key and clicking on the entity in the Graphics Display window with one of the mouse buttons. Blank, Unblank, and Delete Entities that are highlighted or selected can be blanked, unblanked or deleted by clicking on the appropriate buttons. A deleted entity can only be retrieved by reading from a file. Clicking the Tog Blank button will exchange the display status of blanked and unblanked entities. A J,K,L index notation is used for all grids.