All tooltips copy should be in sentence case i.e. the first letter of the first word is capitalized and everything else is in lower case unless it's a proper noun or feature name.
Should tooltips have punctuation?
In general, do not use punctuation at the end of a headline, button label, checkbox or radio button label, tooltip, text link (unless the link ends a sentence), or navigation element.
How do you use tooltips?
Tooltips are usually initiated in one of two ways: through a mouse-hover gesture or through a keyboard-hover gesture. (In case you're wondering what keyboard hover is: to access the active elements on a page, users can usually move the mouse to them or tab through them using the keyboard.
What is tooltip give an example?
A tooltip is a small section of text that is designed to explain how one particular element of your product works. It normally appears when a user hovers over the element in question, or a little āiā icon that's next to the element.