Where are my fuses?

I've got a 22 foot sylvan lx...My dash is set up with white push button circuit breakers...I'm assuming that there are fuses underneath of them....How would I change or check one if there is a problem..This is a probably a stupid question for most but I don't claim to be a mechanic and I could really use the help...I'm assuming that there is not a fuse box with all the fuses in a central location like that a car has.
The circuit breakers are located next to my lights and my radio....How can I tell whic fuse works the tilt/trim?

If they are circuit breakers, they should just need to be re-set, not changed. They are probably push button ones. I would check to make sure they are pushed in first. You may also have some inline fuses that would need to be checked, probaby not for trim, more for stuff that draw continuous electrictity like depth finders and stuff. There may also be a main ciruuit breaker or main fuse in the back by the batteries. If it is a circuit breaker, it can be re-set, however if it is a fuse it is probably like a 20-30 amp fuse, just like a car would have. This will probably be off of one of your battery cables, or one of those many cables down there. It iwill look like a 1 inch x 2 inch plasitc clip in the middle of a power line. It should have a clip on it and you can slide them apart to access the fuse.