To edit a slide title, double click on it in the Deck tree. Edit the title and press enter.
The deck tree shows you the slides and sub-decks within your deck. It contains functions for restructuring your deck. Use the arrow keys to move up and down through your slides.
The context menu allows you to add a new slide or sub-deck, duplicate or delete a slide. This can be accessed through the expansion button to the right of the slide title or using the shortcut key right-arrow.
You can re-order slides by dragging a slide to its new location in the deck tree.