What should be ensured when labeling emergency switches and controls?

When labeling emergency switches and controls, it is essential that the letters are easy to read. This clarity is critical in emergency situations where quick understanding and action are required. Easy-to-read labels help prevent confusion and ensure that operators or bystanders can swiftly identify the functions of the switches and controls under pressure, maximizing safety and efficiency.

While the other choices touch on important aspects of labeling, such as durability or bilingual options, the primary goal during an emergency is to have clearly legible instructions that can be quickly understood by anyone who may need to react. Therefore, prioritizing legibility directly supports the effective use of emergency controls and enhances overall safety in the elevator system.