The Edit menu items (see Figure 11) work with any text window. The user must first select (bring to the front) the text window to be edited.
Figure 11. The Edit menu.
Undo
"Undo" can undo the last change made in the selected text window. "Redo" will redo the last change that was undone. An arbitrary number of undo's and redo's can be done to the changes in any of the text windows.
Cut, Copy, Paste, Delete, Select All, Find, and Replace
"Cut", "Copy", "Paste", "Delete", "Select All", "Find", and "Replace" work in the usual fashion.
Preferences
"Preferences..." brings up the Preferences dialog. Through this dialog, you can change the font, font size, and font style for the text windows containing assembly code and for the display of the contents of Register and RAM windows. You can also change the default syntax coloring used in text windows for the labels, keywords, and comments. Finally, you can specify the use of punctuation characters in assembly language, for example, to indicate the start of a comment, the end of the label, and the start of a pseudoinstruction.
Note that on Macintoshes, the "Preferences..." menu item is not in the Edit menu and instead is moved to the Application menu (the leftmost menu, entitled "CPU Sim").