One thing I do very frequently is to have a set of frames in an object and then another event to set the objects frame to one of random of those frames. This can be for all sorts of things like for example you have a bush object and you have 5 different frames in that object to make the object appear as 5 different types of bushes at random.
However I always have to change the formula as I add or remove frames so if I have 5 frames I have set to random(5) etc. But if I add another one I have to manually change it to 6 (or have an alterable value to change).
My question (or suggestion if it is not possible) is if it would be possible to instead just set the objects frames to random for however many frames there actually are? This would cut out a lot of busywork.