How do you use hidden characters on keyboard?

How do you use hidden characters on keyboard?
To use Alt key codes, ensure that “Num Lock” is on — you may need to tap the Num Lock key to turn it on. Next, press the Alt key and hold it down. Tap the appropriate numbers using the number pad at the right side of your keyboard and then release the Alt key.
How can I find hidden characters in text?
Sometimes developer needs to check the text if has some hidden characters before storing it in the database. Just type the text in the box and the hidden characters would be revealed.
How do you find hidden characters in InDesign?
One of the great benefits of membership is access to all the back issues of InDesign Magazine. These invisible characters (such as returns, spaces, tabs, and so on) only appear when you have Type > Show Hidden Characters turned on. And, as you pointed out, they take on the color of their layer (just like the frame edges of selected objects).
How do you type special characters on the keyboard?
To type a special character, using an Alt keyboard sequence: Ensure that the Num Lock key has been pressed, to activate the numeric key section of the keyboard. Press the Alt key, and hold it down.
How to type hidden Mac keyboard symbols and characters?
For example, to create a shortcut for the copyright symbol on Mac: Type in the © character into your editor as described above and copy it with Command + C Paste your © symbol in the With column on the right Type in a desired key combination to trigger the copyright symbol on Mac in the Replace column on the left