I'm not sure specifically as there could be various mousepad stories. It might be about the design process of mousepads, like how different materials are chosen, the art that goes on them. Maybe it's stories of people's favorite mousepads and why they like them so much.
One mousepad story could be about a mousepad that has a special design. For example, a friend of mine has a mousepad with a map of his favorite video game world on it. Every time he uses his mouse, he feels like he's exploring that virtual world all over again.
I remember a mousepad at an office I worked at. It was a large mousepad that covered most of the desk area. There were some funny quotes printed on it. Whenever we had a tough day at work, we would look at those quotes on the mousepad and it would cheer us up a bit. It became a sort of morale booster in the office environment.
The significance could be purely for comical effect. Maybe the writer thought it would be funny to pair a strange character like Clamps with a random object like a mousepad in a yaoi relationship.
I'm not really into yaoi fanfiction involving Futurama characters like Clamps and a mousepad. However, in general, yaoi fanfiction often explores unique relationships and character dynamics. It might be that the writer saw some kind of potential in these two elements from Futurama, perhaps a contrast in their natures that could lead to an interesting story of love or tension in the yaoi genre.
One mousepad feet story could be about a gamer who noticed that the feet on his mousepad were wearing out unevenly. It turned out that his unique way of moving the mouse during intense gaming sessions was causing it. He then had to find a new mousepad with better quality feet to improve his gaming experience.
Zoom, in comics, is a complex character. His real name is Hunter Zolomon and he has a twisted view of justice and time manipulation, often causing chaos for the heroes. He is a powerful foe for speedsters.
You can usually zoom in on comics by using the zoom function provided in the digital comic reader or app. Just look for the zoom icons or options in the interface.