Hi Dale, welcome to the forum,
How do you want the user experience: having a Next button on each slide, that will pause the slide? In that case Himanshu's solution is the right one, but be sure the pausing (vertical double line in the Timeline is the visual indication of that pause) is after every object has appeared. Timing can be set in the Timing accordion.
Second possibility: replace the default button by a Shape button. Under the Shapes panel (top icon in the left vertical toolbox) there is a Category Buttons: you'll find the Next button there as well. Advantage of those shape buttons is that you can insert them on Master slides or time for the rest of the project.
Another possibility: instruct the user to click on the slide to advance, without a button: in that case insert a click box on the first slide and resize it to cover the whole slide. Check its timeline, so that it extends till the end of the slide. You can do that by selecting its timeline and using CTRL-E or by using its Time accordion. Typical for a click box besides it invisibility to the user is that it pauses right at the end of its timeline.
Each interactive object can have a pausing point: button, shape button, click box and Text Entry Box.
Lilybiri