Shower Doors

[col72]

Noticed our shower doors don't meet properly at the bottom each door has 4 rollers on it the top 2 on both doors has screws in them is this how I adjust them if so how

[The Builder]

They do vary, col, as you might expect. It's quite common though, for the top rollers to be adjustable.

Often, they are simply loosened off and re-positioned.