Moving through the service items and within a service item are not clear.
This issue is from the forum...https://forums.openlp.org/discussion/5255/right-arrow-key-behaviour
he OpenLP Manual has this section in it at one point.
Moving Through a Service¶ Once you have your first item displayed live you can move through the service in a couple of ways. You can double-click on each item you need displayed, or click it once and press enter. If your songs, verses, etc. are in the order you will be displaying them, you can use the Right Arrow key on your keyboard to move down through your service.
P.S. The manual is a little unclear;
In the Moving Through a Service section where it states: you can use the Right Arrow key on your keyboard to move down through your service It means down through the service list, not through individual slides. The section following that, titled Moving through a song bible verses or images contains the information about switching through slides within service items.