The Undo command is active only when there are some unsaved changes made to the current Tessel Composite Document . The Undo command cancels the changes made in the last step of editing. If there are several unsaved steps of editing, the maximal number of available Undo steps is defined by the MaxUndoSteps parameter in the supered.ini file (see Appendix for the description of supered.ini file).

To cancel all changes made to the composite document and its subdocuments, close it without saving and reopen the same document.

The Redo command is active only when there are some changes made to the current Tessel Composite Document that have been previously cancelled using the Undo command. The Redo command brings those changes back. If the Undo command has been issued several times, the Redo command can be issued the same number of times, moving one step forward each time.

The Copy Image command is used to send a copy of the current document to the MS Windows system Clipboard. It is used for simple interchange of documents between different MS Windows applications.

The Copy Image command prepares data from the whole document, no matter what the current view is. It is also possible to define sizes and resolution for preparing a copy of the document. Four variables are used for this purpose, Width, Height, Xres and Yres , all with the ClipboardCopy prefix defined in the TSLRVC Library Settings section of the supered.ini file. Editing this file can change all these parameters. New values are used next time the program is run.

The default settings of variables result in making a copy of a document that is 6.67 inches wide and 5 inches high with 96 dots per inch resolution. These parameters reflect the size and resolution of a typical monitor screen. A document will be scaled in such a way that it will cover the demanded area as fully as possible. A document can be copied in every available format (embedded object, link, bitmaps and metafile).