How to use an invisible space
Choose the character, set the quantity and press Copy invisible space.
What is an invisible space?
It is a Unicode character that may look empty while still occupying a place in the text. It is not the space bar (U+0020). Support depends on the app, platform or field where you paste it.
Braille Blank and Hangul Filler often leave a gap. Zero Width Space does not: it is a zero-width format character.
Compatibility
Invisible Unicode characters do not behave the same in every app. Some keep them, ignore them, delete them or display them differently. If one option fails, try another.