How to reduce size of window?

[Speedy]

Using a 15 inch MBP running Mojave and Safari.  The width of the forum screen is just over my screen width, such that I'm getting a scroll bar left and right.  I'll try to post an image:

... I'm using the default "Scaled" resolution in Sys Prefs, with the next-to-last option chosen for more space (so I could only go one size smaller for the text).

You might have the "View" zoomed in, in Safari.  Try Command-0 (Zero) to reset it to "Actual Size", or Command +/- to zoom in/out.

Duh, this fixed my issue on my iPad.