In order to remove an element, you must first select the element (or the element subsequence) you want to remove. Then you have several options:

1. Use the main menu: "Diagram › Delete";
2. Right click the element and use "Delete" in the popup menu;
3. Hit the key <Del> on your keyboard;
4. Use the following speedbutton: (in versions before 3.27-08 it used to look like ).

If you want to reuse the element at a different place or in another diagram then you should cut the element instead, this leaves a copy in the local clipboard:

1. Use the main menu: "Edit › Cut";
2. Right click the element and use "Cut" in the popup menu;
3. Hit the key combination <Ctrl><X> or <Shift><Del> on your keyboard;
4. Use the "scissors" speed button in the toolbar: .

Note: Instead of the <Ctrl> key you may have to use an OS-specific default command key. Mac users, for example, may have to press the "Apple key" () instead of the <Ctrl> key in the respective key bindings ...