Deletes the selected part of the current file. If nothing is selected then the character to the right of the cursor is deleted.
This command is always invoked on whichever editor is showing the text cursor (vertical blinking bar), regardless of whether you use the main menu, a toolbar button, or a keyboard shortcut.
The Edit|Delete menu item is not affected by Block|Persistent Selections. It always deletes the selection if there is one. To delete the character to the right of the cursor when there is a persistent selection, press the Delete key on the keyboard.
Fold|Delete Folded Lines