Width of email page

Thank you for replying so speedily g4s. I thought I needed those diagonal lines at the bottom right of the window, to do that. I looked for them before I posted this, but I couldn't see any. I will try what you suggest in a moment. Learner73

Thank you for your interest sig. I am on BT YAHOO through Safari. You helped me before about my email ending in people's Spam and Junk folders. I have had a reply from BT, but m not convinced yet! Learner73

No g4s. It doesn't move anything. It all just sits there

Hello, I don't have a Safari window, just the word Safari along the Toolbar, underneath which is my BTYAHOO Mail window. There is nowhere that I can see, from which to reduce the size of width, length, or anything else on that window. No diagonal lines or any means of dragging anything to anywhere. I'm sorry. I can't see a way to overcome it. It has never happened before. Learner73

Sorry,g4s,
You were right! I have, by accident, moved upwards,the whole frame of the BTYAHOO window. There, I found the elusive diagonal lines in the R.H.corner! I have done what you said and thankyou. Learner73