Whilst holding down the CTRL key press the - key to shrink the display to fit your screen or + key to enlarge it.
Sometimes that can shift the display around.
Alternatively, choose a different display theme?
Click on PROFILE
then click on MODIFY PROFILE
next select Layout
Choose the display theme you want - eg. Default (Reseller), Core Theme or My Community
Then select the display options you prefer
To save click on CHANGE PROFILE
To have the minimum of scrolling, my choice is Core Theme and don't display avatars etc so that the screen display is as simple and uncluttered as possible. It's the same as the theme on Stitcher's Guild / Artisan's Square