# How do I change the X-step on the TI-84 Plus?

I am trying to create a vertical line in my calculator, but it needs to be restricted to a certain height. I have an equation with a very high slope and I need to restrict its domain to hundredths. I already know how to restrict its domain using logical operators, but the line simply disappears if I lower the domain to a very small amount with the domain still covering the line.

I believe my problem is that the X-step of the calculator, the amount of space it has between points, is too low. IIRC the default value is $0.1$, I need to reduce it to $0.001$. I know I've seen this setting before but I can't find it anywhere on the calculator or online.

Press "Window". It is not X-Step, it is Xscl
• Aaron, respect my attempt. I gave five minutes of my valuable time looking for the answer to this unclear question. P.S. by unclear, I mean what do you want to find? A way around the points dilemma, or finding the X-Step? – VortexYT May 16 '17 at 18:29
• My formula that I've come up with so far is -2(x+7)^2+e^(10x+20)+9/((x<-5 and x>-9) or (x>-1.8 and x<0)) but if I try to restrict the right domain to get a vertical line that doesn't span the screen, it disappears! – Aaron Franke May 16 '17 at 18:44