How do I create "letter-by-letter" text?

I'm looking for a way to make text appear one letter at a time in dialogue boxes (similar to most RPGs). Right now I'm using the "Set text" function which causes the text to appear all at once, but I'd rather have it come in letter-by-letter. Any advice on how I could do this?

Thanks in advance.

Is this what you mean: https://www.scirra.com/forum/can-we-get-this-behavior-for-text-object_p761152?#p761152

It's a typewriter type effect.

That's exactly what I'm looking for. Thanks a lot!