How do you adjust the height of a crib mattress?

Does anyone know how to properly adjust (lower) the height of a crib mattress? I have a Baby's Dream (Ocean model) crib with a drop-down side and I need to lower the mattress because my son is now able to sit/stand in the crib (I believe this crib has 3 or 4 mattress levels). The manufacturer's website has directions on how to assemble the entire crib but none on how to specifically adjust just the mattress. Thanks for your help!How do you adjust the height of a crib mattress?i'd call customer service at the comapny if you cant figure out how to do it for yourslef... it usually is pretty simple... try taking off the mattress first it should help you get a better look at thingsHow do you adjust the height of a crib mattress?Well usually the matress support is screwed in with brackets that lower. You could take the brackets off and lower then to a lower knotch then screw them back in. So forrow the assembly directions for the matress support only put it at a lower knotch. Thats how my crib works anyways.How do you adjust the height of a crib mattress?You might want to call them, they should have a number. Because each model is slightly different than the rest. But typically there should be a bolt on the four corners that you can raise or lower. With mine at least that is how it is, we just assembled it the other day ugh.How do you adjust the height of a crib mattress?If it's like our crib, there's little %26quot;arms%26quot; on each corner of the part that holds the mattress. You have to unscrew those and move it down to the next hole.