It is rare for a slide to physically go out of adjustment, so actual adjustment of the slide should be a last resort. Usually a slide appears misaligned because something is stopping it prematurely. Most slide motor systems are designed to stop when the resistance exceeds some threshold, so it will stop short if there is excess friction or something blocking the path. You would be well-advised to spend a lot of time investigating the slide path for bumps, snags, debris under the slide, etc. You should also clean and polish the underside where is slides over the lip and/or interior floor - this can sometimes make a huge difference. Some slides have rollers on the bottom and a stuck or damaged roller can cause the slide to stop early. So can loose rubber seals that get caught between the slide rim and the sidewall.
Adjustment is mechanically simple in most cases, a set of bolt & nuts to be backed off or tightened. The complex part is that tweaking one typically throws another off and soon you may be screaming in frustration. Make sure you clearly mark the original positions of each adjustment bolt somehow, e.g. by counting threads or placing a mark on an adjacent surface, so you can get it back to the OEM position.