To edit a file, perform the following steps: Click in the hexadecimal or ASCII view of the file. The view in which the cursor is active displays a full cursor. The view in which the cursor is not active displays an outline of the cursor. Use any of the following methods to move the cursor around the file:Use the scrollbar on the window or the arrow keys on the keyboard to scroll through the file.Choose EditGoto Byte, type the cursor offset as a decimal or hexadecimal value, then click OK. The format of the hexadecimal value must be 0x followed by the offset, for example 0x3.Edit the ASCII format in the same way you edit a normal text file. To edit the hexadecimal format, use the values 0 to 9 and a to f.To insert data and not overwrite existing data, choose EditInsert Mode.To cut, copy, and paste data, choose EditCut, EditCopy, and EditPaste.To undo an edit, choose EditUndo. To redo an edit, choose EditRedo. The number of previous edits that you can undo is determined by the Maximum number of undo levels setting in the  tabbed section of the Preferences dialog.
