ti84plus - trying to graph a circle by inputing h,k radius

1.graph

2. zoomdecimal

3. prog circle

** the problem is the screen size is too small to input the coordinates. I tried zooming, manually entering xmax xmin and the other zoom settings.  The delta x keeps changing and so I cannot enter the intiger of for h,k

I need a larger screen view with the same incremental scroll of .1 or .2 or 1 not some long float
in Using TI-84 Plus by

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