This is a bit off topic, but can someone tell me what to do if...

This is a bit off topic, but can someone tell me what to do if only half the post comes up and I can’t scroll right to read the post??

If you are in "thread view" to the left in the grey are you should see the options

full width | single post

Click full width and that should fix the problem. Single post should view in full width by default.

Thats how it works for me anyway.