Reverses the last change made. Undo is a repetitive command.

Activate Undo either by selecting this option from the Edit menu, by pressing Alt-BackSpace, or by pressing Undo shortcut button.

Recalls the last Undo change. Redo is a repetitive command, and can be executed only after pressing Undo , or a previous Redo. Losing the Undo information will cause the loss of the Redo information.

Activate Redo either by selecting this option from the Edit menu, by pressing Shift-Alt-BackSpace, or by pressing Redo shortcut button.

Deletes the marked entities from view and sends them to the system clipboard.

In text writing mode, the Cut command creates a textual clipboard that can be pasted later to any text-oriented editor.

The clipboard may be treated as an additional datastack, holding the entities sent to it as raw material ready to be restored at the desired time. A Cut entity disappears from the screen.

An element must be marked before it can be Cut. Select Cut from the Edit menu or press Ctrl-X to cut an element.

Takes the entities and sends them to the system clipboard in a similar manner to the Cut command. However, all entities remain on the drawing.

An element must be marked before it can be copied. Select Copy from the Edit menu or press Ctrl-C to copy an element.

Takes the system clipboard contents and inserts them into the drawing using the original coordinates.

In text writing mode, the Paste command inserts textual clipboard contents from the windows clipboard. This command is extremely important when you want to enter a large amount of text that was initially typed into the document or merged from e-mail. It works with foreign characters if the operating system supports the pasted foreign language.

Select Paste from the Edit menu or press Ctrl-V to paste an element.

Selecting the Delete option will change the cursor to a delete cursor. To delete an object, point the cursor on the object, or drag a rectangle over the object.

Select Delete from the Edit menu or press Delete to delete.

Delete is a repetitive command. It is terminated when Esc is pressed and the cursor returns to the arrow shape. Delete is recoverable with the Undo command.

Highlights all unmarked elements into a marked state. This function is useful to quickly mark a large group of entities without changing the display zoom.

Select Mark All from the Edit menu or from the toolbar.

Restores all the marked elements to an unmarked state. This function is useful to delete or cancel marks for a large number of grouped entities without changing the display zoom.

Select Unmark All from the Edit menu or from the toolbar. Clicking outside the markbox and away from any entity will also Unmark All.

Reset operation and return to marking mode. Press Esc to achieve the same result.

Measure evaluates vertical, horizontal and diagonal distances as well as angles between two points. After you select the measure function, a rectangle with eight control points will appear on screen followed by the measure dialog box. Move the control point to the desired locations in order to get the distances and angles between the rectangle control points. You can continue measuring until the Measure dialog box is closed.

The values in the measure dialog box can be copied into the Windows clipboard by marking the value you whish to copy (make it appear with blue background) press the right mouse button and select Copy from the pop-up menu.