How do I reduce the size of my computer screen. At present I cannot see the last part on the right where I can scroll up and down the page or the three bits at the top to reducen the size of the pageetc
Bottom right hand corner there is a magnifying glass, click on that and a list of %sizes comes up. Click on one to suit or 'custom' and then set your own.
I'm unsure if I understood the description properly but is this a monitor rather than a Windows software thing ? See if you have knobs on your monitor that allow you to change the width, height, ratio etc.
I think dicmor wants to reduce the size of the WINDOW, not the contents.
As long as you can see at least part of the header, click and drag it towards the centre of the screen. That should reveal a corner. Click and drag the corner towards the centre of the screen to make the window smaller. Finally reposition the window on your screen by clicking and dragging the header once more.