While the two terminals had identical functionality in this regard, different control sequences had to be used to invoke them.Īs these sequences were different for different terminals, elaborate libraries such as termcap ("terminal capabilities") and utilities such as tput had to be created so programs could use the same API to work with any terminal. The Hazeltine 1500 had a similar feature, invoked using ~, DC1 and then the X and Y positions separated with a comma. One example is the VT52 terminal, which allowed the cursor to be placed at an x,y location on the screen by sending the ESC character, a Y character, and then two characters representing numerical values equal to the x,y location plus 32 (thus starting at the ASCII space character and avoiding the control characters). They are used in development, scientific, commercial text-based applications as well as bulletin board systems to offer standardized functionality.Īlthough hardware text terminals have become increasingly rare in the 21st century, the relevance of the ANSI standard persists because a great majority of terminal emulators and command consoles interpret at least a portion of the ANSI standard.Īlmost all manufacturers of video terminals added vendor-specific escape sequences to perform operations such as placing the cursor at arbitrary positions on the screen. The terminal interprets these sequences as commands, rather than text to display verbatim.ĪNSI sequences were introduced in the 1970s to replace vendor-specific sequences and became widespread in the computer equipment market by the early 1980s. Certain sequences of bytes, most starting with an ASCII escape character and a bracket character, are embedded into text. Select the double underline option, and click OK.ANSI escape sequences are a standard for in-band signaling to control cursor location, color, font styling, and other options on video text terminals and terminal emulators.In the Font window, click the drop-down list under Underline style.In the Ribbon, click the arrow in the bottom-right corner of the Font section.The font settings window in Microsoft Word provides several underlining options, including double underline. Select the Double underline option in the drop-down menu.In the Ribbon, on the Home tab, click the arrow next to the U button.The Ribbon in Microsoft Word provides an option to create double underlines for selected text. Press the keyboard shortcut Ctrl+ Shift+ D.Highlight the text you want to double underline.You can double underline text using a keyboard shortcut. Review each method below and choose the one that works best for you. There are several ways to double underline content in Word. In Microsoft Word, double underlining helps draw extra attention to specific words or numbers, such as denoting a grand total.
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