If you have elected to proceed with a certain mode of trial, you may have a right to re-elect to proceed to a different mode of trial, depending on what mode of trial you elected and what mode you intend to elect to.
Re-election may require giving notice a specific amount of time before re-election and/or obtaining crown consent to re-elect. Re-election can bring up concerns about delay, and may require you to waive your Charter-protected right to a timely trial.