Setting Plot Limits
logxy, xflag, yflag set log or linear axis scaling
The four plot limits can be numbers to fix them at specific values, or the string "e" to specify extreme values. The limits command accepts the keywords square, nice, and restrict, which control how extreme values are computed.
Plot limits may also be set by point-and-click in the X window. The left button zooms in, middle button pans, and right button zooms out. Refer help on limits for details.