All from the Edit menu. You cannot search for graphics on the graphics layer. If you check the Find Text Only command from the Options menu, the search for a graphic finds any graphic in the text. Because graphics usually differ in size, the search often identifies graphics uniquely. You can replace any graphic with another graphic or with text and vice versa, but you must have the Replace Text Only command in the Options menu unchecked.
Graphics can also form a part of a searching pattern just like any regular character.
As you become more familiar with the find and replace facility of Nisus, the following tips and techniques will be very useful. The Tab key moves the insertion point back and forth between the Find and Replace boxes. If there is text in either box, that text is selected. Clear each box in turn, then close the window. When you reopen the window, it will be in Any Font , etc.