A bigger cube means more stickers, but you can take your time. This guide shows you how to enter a 4 × 4 and follow its solution. You do not need to know any algorithms.
Find one corner piece with white, green and red stickers. All three stickers must belong to the same piece. Turn the whole cube until that corner is at the top front right:
The rest of the face can be mixed up. On a 4 × 4, the four centre pieces can move, so their colours do not tell you which way to hold the cube. Our reference corner gives you a starting point instead.
While entering, rotate the whole cube to inspect it. Do not twist individual layers. If you make a mistake, use Undo tile or Clear this face.
After checking the colours, choose Solve My Cube. Find your reference corner again and put it back at the top front right, with white up, green towards you and red right. Then confirm that your cube is ready.
Once the moves begin, keep holding the whole cube the same way. The reference corner may move away. That is expected. Do not rotate the whole cube to put it back.
The letters describe positions: U is top, D bottom, F front, B back, R right and L left. They do not describe colours.
Judge clockwise as if you were looking straight at the face named by the letter. For a back or bottom move, imagine looking directly at that face. Keep your grip and the whole-cube orientation unchanged.
The unfolded picture shows your cube before the next move. The six faces may finish in a different overall colour orientation from the starting position. What matters is that each face is uniform.
Stop before making another turn. Check your holding position and whether the last move was an outside turn or a two-layer turn. If you cannot recover, reset and enter the cube as it is now. Returning to your entered cube shows your original colours, not its current physical state.
Some 4 × 4 states look unusual when the centres and edges are nearly solved. These are often called parity cases. They can occur on a legal 4 × 4, and the solver handles them as part of its solution.