You can use socket head spanners to adjust the leg rests. However, In any case, it is often necessary to remove some removable accessories before folding the chair to minimize clutter. Then, using only one hand or a finger, the folding should be done easily and quickly, without exerting great effort. The adjustment and folding system are specific to each chair. A manual usually tells you all the steps you need to follow to easily adjust and fold the material.