Portrait to Landscape?
That's the problem...you have to remember to return to portrait. Not a big issue, but it is aggravating at times and can waste paper. Plus, the resulting formatting is really awkward at times.
Copy and Paste?
The suggestion to copy and paste from the web to a word processor was OK, however, not all web pages let you copy the content, and more are going that route every day unfortunately (they don't understand that technique can severely compromise the ability of people with degraded vision to read the web pages. Third party view enhancing programs sometimes don't work with such websites).
Special "scale for web-page" feature?
Most printer "preferences these days contain a "scaling" capability...it can be used for all sources, not just web-pages. It may be a special "scaling" feature, or it may show up as "fit to page" or it may be provided under both categories.
I've also discovered that this problem can occur when I use printer preference settings to auto-include header and footer info (for info like URL, page x of y, date, etc). For some reason, doing that SOMETIMES screws up ALL the margins...not just the top and bottom when viewing/printing web-pages. In addition, sometimes changing the web-page "view" text size makes an unpredictable difference.