Most UpSlide features can be accessed through keyboard shortcuts. They all start with Ctrl + Shift.
In UpSlide PowerPoint or Word, go to UpSlide/Settings/Short-Cuts and you will access a list of all available shortcuts. You can either, deactivate some of them (if, for example, they compete with some other add-in shortcut) or assign new keys.
To assign a new key, simply select the shortcut, press the key, and click on assign.
Note: the default values are displayed when hovering over the feature ribbon button.