My eM Client screen is at the bottom of the computer so that I can only see the top few lines and can't read emails.

I can’t move the em client screen - this happened once before and I don’t remember how I sorted it.   I think I have pressed a key by mistake, but I can’t see emails as they are all at the bottom of the screen.

When in the eM client program, hit F1 for help which will take you to the internet  help page, look for settings and select layout and you will see the options open to you.

To get to the settings in the program, goto Menu>Tools>Settings>Appearance. 
Which ever layout you choose, you can always alter to areas between message headings and message areas by dragging with your mouse to either make bigger or smaller.