Hover the cursor on top of the order and click on the X to cancel.
2. Bulk by Side Canceling
Depending on your Orders Column View Mode you will have on the bottom row dedicated cancelling buttons.
3. Closing positions and orders
Orders column will place a button on the top row allowing you close either positions and working/pending/accepted orders, only position or only working/pending/accepted orders.
Click will close all positions and working/pending orders.
Click + CTRL key : will close only the position.
Click + SHIFT key: Will close only the working/pending/accepted orders.
4. Reversing a Position:
Click on "R" will close the current open position and open a reverse position. This applies to ATM as well.