A remote control is essential for changing slides. It is your responsibility to know how the one in your hand works and its range. Find this out before you take the stage. My best advice is to buy your own remote control.
An essential part of pre-presentation preparation is a full run-through of your presentation, on the stage with the remote control to be used in the live presentation. The key to effective use is understanding where to direct the signal. Do not assume. The radio or infrared signal has a limited range and requires a “line of sight” direction towards the receiver. The receiver is on the broadcast computer and may not be on the stage, in the projector or in the IT booth. Find out exactly where to point the device and the effective range of the device, particularly if you move around the stage or even the auditorium.
Additional controls, such as “slide blank” and pointer, are not always provided. Determine this during the run-through and make appropriate changes if possible. Never use voice commands to either a distant operator or as some advanced voice control over a laptop. Similarly, resist the option of using the laptop keyboard; it fixes the presenter to the podium and risks incorrect commands under nervous fingers. Remember, if using a handheld microphone as well, that means you have no free hand.
My best advice is to buy your own remote control. You will fully understand its functions, it gives a sense of comfort and reduces tension on the day. This requires you to carry spare batteries. Still ensure the device works in every new environment and that you are in functional range. No two remotes are the same. Do not fall for gimmicks such as highlighting or drawing on screen. Do not use Apple watches or mobile phones, despite the advertising.
The remote control allows the presenter to control the slides if used effectively. This requires pre-presentation preparation and knowledge. That is reduced by using your own remote control.