Edit Menu For Text Editor
Undo
Cancel the previous operation.
Redo
Reassert the previous canceled operation.
Cut
Put the selected text in clipboard and clear the selected text.
Copy
Put the selected text in clipboard. The selected text will not be cleared.
Paste
Replace the selected text with clipboard content or just insert the clipboard content when no text is selected.
Clear
Clear the selected text.
Select All
Select all text in the file.