Simulating a screen brightness control
I am trying to simulate a screen brightness control on a training tool for locomotive driver console. This console has 8 function buttons, which are used to navigate to various screens depending on the scrren currently displayed. There is another button that is used to control the brightness of the display and I want to simulate this by pressing the button and displaying a semi transparent rectangle over the screen. I can do it for a single screen using the advanced actions but I don't know how to have this work on all screens without repeating the process for every slide. I tried to put this feature in the Master sldie but with no joy
I have an image of the device front panel on a Master slide and I am have created moveable buttons on each subsequent slide to navigate to the relevant images I am navigating through.
If anyone has any helpful hints on how to achieve this I would appreciate it.
Cheers
Greg