The Editor provides the standard methods of cutting, copying and pasting text using the clipboard. To select a region of text, click and hold down the select button, and drag the pointer across the region you want to select: the text is highlighted using the Region Highlight text style as you select it.
Choose Edit > Select All to select all the text in the buffer, and Edit > Deselect All if you want to deselect it.
Once you have selected a region use either of the following commands:
Choose Edit > Paste to copy text from the clipboard into the current buffer. The text is placed at the current cursor position.
These commands are also available from the context menu in the editor window, which is usually invoked by clicking the right mouse button.
The Editor also provides a much more sophisticated system for cutting, copying and pasting text, as described below.
LispWorks IDE User Guide (Windows version) - 12 Feb 2015