1. A method of providing a real time preview of changes to fonts in a computer system operating a document editing program having a document display window, comprising: storing an active document in a memory medium; displaying at least part of the active document in the document display window including text having an associated font command code, the document display window for editing the active document therein; tracking a cursor position controlled by a user in the document editing program; identifying a font by hovering of the cursor for a predetermined period of time over the font displayed in a menu or toolbar option of the document display window, the menu or toolbar option providing one or more available fonts, each of the available fonts associated with a respective font command codes that can be applied to the active document; inserting the font command code corresponding to the identified font into the memory medium storing the active document and updating the display of the active document in the document display windows to show the impact of the inserted font command code on the display of the text of the active document, without confirmation being received from the user; pushing the font command code corresponding to the identified font to the undo stack when a subsequent confirmation is received from the user; and removing the font command code corresponding to the identified font from the memory medium when subsequent confirmation is not received from the user or when another font command code is identified.