Letter

Each letter, character, or symbol is surrounded by an invisible box, known as the element box or em box. Its purpose is to hold each letter that is shown in a web browser live. An em box is visible when a mouse highlights the letter, and a color appears instantly behind the letter. The color may vary according to browser and color of the typeface itself. An em box has been used before with other media, such as the letterpress which is 500 years older than the web. In letterpress an em box is a physical metal box that contains a letter.

Once the metal box is arranged along with other metal boxes to make a word, sentence, or a paragraph, each letter could be inked, and then, as a final step, it needs to be pressed on paper. Nowadays, we use em boxes in almost all digital applications and devices, particularly layout software. Overall, em boxes are used everywhere from metal boxes on the letterpress to highlighted letters on the computer screen.

Each letter, character, or symbol is surrounded by an invisible box, known as the element box or em box. Its purpose is to hold each letter that is shown in a web browser live. An em box is visible when a mouse highlights the letter, and a color appears instantly behind the letter. The color may vary according to browser and color of the typeface itself. An em box has been used before with other media, such as the letterpress which is 500 years older than the web. In letterpress an em box is a physical metal box that contains a letter.

Once the metal box is arranged along with other metal boxes to make a word, sentence, or a paragraph, each letter could be inked, and then, as a final step, it needs to be pressed on paper. Nowadays, we use em boxes in almost all digital applications and devices, particularly layout software. Overall, em boxes are used everywhere from metal boxes on the letterpress to highlighted letters on the computer screen.