The functions were added in yesterday, but I'll make a note of it on this log.
These include the "Invert" function and the "Minor ⇄ Major" function. They can be found in the GUI below the Online Sequencer logo under Tools > Invert/Minor ⇄ Major.
Invert vertically flips your sequence notes in relevance to their distance from B4/C5 on the keyboard. This option might not seem practical at first, but it does provide a conventional way to get more ideas!
Minor ⇄ Major nudges the thirds of your sequence notes to their respective tone. You have to select a key first to make this function work. You can do so by clicking on Key (Auto Detect) at the bottom of the sequencer.
Stop flipping tables and flip your sequences today!