Load next on keystrokeInstead of loading the next file based on a time delay, the space-bar could be used to trigger the loading of the next file.
Backspace could load the previous file. This would allow the creation of a set of files that could be used as presentation software.
Update: RemoteSign Sequencer has now been created that allows very much more flexible screen displays, including sensor support and single step scripts.
FontsAbility to set the type face of the heading (non-animated) lines. Not sure how important this is.
Ability to hide the clock
Request for current contentA connecting machine could ask for the current screen rows and content.
White List and Black List of machines that may connect to a signEach sign could have a list of machines that may connect, or a list of machines that may not connect to it and control it.
Reduced screen rows size to accommodate additional columns on a remote machineSee screen aspects for details.
Display data feedsFor example, stock prices or
Note that if there is a feature that you really want to see, I am more likely to consider suggestions from those who have made a donation!