You don't say what kind of bedrm slide (yr & model) so I'll guess you have a closet that slides to the DS.
The slide mechanism on the inside has all the adjustment. There is a double scissors that actuates the closet in/out. Each part of the slide (2 uppers & 2 lowers) has an adjustment, and each side of the slide is mounted so as to be adjustable up or down. The total travel IIRC is adjusted w/the threaded extension of the rod that connects upper & lower scissors on each side. The adjustment is tedious since all of the mechanism is behind the wood frame of the closet. You can get to the front part easier if you disassemble the shower enclosure, which is much easier than it looks and within reach for a competent DIY'er.
HWH has documents for the slide on their website, but they are weirdly indexed. Our closet slides use the "lateral arm" type slide mechanism. You can call their number, (800)321-3494 and ask for customer support. They should be able to direct you to the appropriate manual for installation/adjustment. We don't have a copy on the ACA Tech Page
, so please forward an electronic copy to the web mistress via the link at bottom of the Page.