Revolution Slider isn't fantastic at dynamically scaling the contents of its slides for different screen resolutions - namely, if you use buttons anywhere, everything else resizes but the buttons remain massive on mobile devices. It manages to do this for most things - such as text and images - but not everything. However there are ways around of this - some of them are quite technical and others are more simple.
The truth is that, each time you create a slider, we need to create it 4 times for the different devices - large desktop, average desktop (laptop), tablet, phone (there is actually both landscape and portrait layouts for phones but the plugin doesn't have previews for this). E.g. if you have 4 sliders you will have 12 "views". That's what these buttons are for:
When you are making your stuff, make sure each device version is inside these blue dotted guides, like this:
And not this:
Here is a handy setting for doing coloured bars on which to set text to aid readability (this option is available for each layer):
You can change things like layer size and font size to get things to fit.
Now, the fun part is that every one of these needs to be tested on different devices because the previews (and this is generally the case within Wordpress) are pretty much never accurate. So try to check how your slider looks on a privately published page while or after working.
The really fun part is that you can't have different sized buttons for different screens - they're always the same size. Meaning you get gigantic buttons on mobile. One compromise is not having buttons on mobile phones, and linking the entire image to the respective page instead. This is good because it means there is a bigger zone to tap than a little button. It sometimes looks a little odd where a button is conspicuously "missing", but it's OK for a simple fix. You can disable elements entirely if they are just too much for a smaller screen with these options:
This is why you don't tend to see complex elements like sliders on mobile devices - most people just disable them entirely because it's too much work. And when images are used, they are scaled down so small that they become unintelligible. But it's still possible to have this dynamic content on your mobile site with careful tweaking.
Duplicating your sliders and making the necessary tweaks is a good way to make your sliders consistent.
It's generalyl good design and usability practicve use the same fonts, similar sizes and buttons styles throughout the slides. The most important thing is to focus on legibility. We always say, "keep it simple" and "avoid unnecessary design elements" - with each thing you add, ask yourself, what is it doing? Give every element a job.
If you have any difficulty using your slider plugin, feel free to e-mail us and we'll do our best to help out.