A manual tile cutter allows you to cut ceramic and porcelain tile without using a wet tile saw. Be aware that manual tile cutters have limitations: they cannot cut natural stone tiles, they can only cut straight lines and they cannot cut notches of any shape. If all you need to do is cut a straight line through your tile, a manual cutter will do the job.
Make a few practice cuts following manufacturer specifications. Become familiar with the operation of the cutter before beginning work on your tile.
Measure the size of the cut and mark the tile where you want it cut.
Place the tile underneath the cutter and line the mark up with the scoring wheel. Apply firm, even pressure to the tile to score the surface.
Place the cutting shoe on the edge of the tile and apply steady pressure to make the tile break along the scored line.