Cuneiform to left-to-right in horizontal rows (rotating all of the pictographs 90° counter-clockwise in the process) and a new wedge-tipped stylus was introduced which was pushed into the clay, producing wedge-shaped ("cuneiform") signs; these two developments made writing quicker and easier. By adjusting the relative position of the tablet to the stylus, the writer could use a single tool to make a variety of impressions. Cuneiform tablets could be fired in kilns to bake them hard, and so provide a permanent record, or they could be left moist and recycled, if permanence was not needed. Many of the clay tablets found
Ur (cuneiform) in many Amarna letters. The cuneiform "ur" cuneiform character (no. 575) is built in a 'rectangular box form', sitting upon a long horizontal stroke. It contains the 2-verticals at left and 1-vertical at right. Three other signs are similarly built, but contain 1-vertical at left, with 2-verticals at right for lu (cuneiform) (with 3-short horizontals in the center, no. 537), and the same but only 1-short horizontal at center, ib (cuneiform)(also "ip", no. 535). The third similar sign, (no. 536) has 1-vertical left and right, ku (cuneiform). It also has 3-short verticals in the center, but is often such a