Scroll with arrow key and hide/unhide open windows

Scrolling with the mouse can be hit or miss and popping up the viewfinder works, but takes extra steps, so how about an option to use the keyboard arrow keys to scroll left or right.

Even with this good program the window desktop can get cluttered fairly quickly, so how about hide and un-hide open windows by tag. Tag this window with group A or group finances and these windows with tag games. Want to see just the open games windows ? Click on task bar and choose show games, or show finance or show all or hide all in case you are at work LOL. Just a suggestion.