Help with 3d perspective

I'm making a text 3d via clicking on 3d and materials, and I want to make it look "longer" so that it looks like it's more depth. There's a perspective slider which at first when I'm changing it does exactly what I want it to do, but as soon as I confirm it, it glitches the text. How can I increase perspective without it glitching out on me? I'll provide screenshots for references.