The phrase "a tooltip" is correct and usable in written English.
It is typically used in the context of user interface design, referring to a small pop-up box that provides additional information about a user interface element when hovered over or clicked.
Example: "When you hover over the icon, a tooltip will appear, explaining its function."
Alternatives: "a help tip" or "an info bubble".
Sets a "tooltip" that will appear if the user hovers their mouse over the interactor.
Force is a complementary sensory modality allowing accurate measurements of local object shape when a tooltip is in contact with the object.
To streamline the process of looking up the description of each gene, Clustergrammer automatically displays the full name and description of a gene as a tooltip when a user moves the mouse over a gene name.
There was also some confusion when it came to the "add-on" option for services on a user's service list, so there is now a tooltip for that as well.
If you hover over the comment you'll see the recommend button display alongside the number and if you hover over the number you'll see a tooltip explaining that it means that the comment has been recommended by that number of people.
When I get one of those charming letters from the Russian mafia inviting me to check my account details at eBay, or the Washington Mutual Bank, I need only hover the mouse over the link they supply to see the real destination appear in a tooltip.
This chapter helps the user learn how to communicate their design, including design specifications, how to add a ScreenTip (tooltip) to a content hyperlink, and how to insert comments and add annotation areas.
But once you boot back up, Duet is installed as a menu bar application, and provides a helpful tooltip window at first launch to get you started.
On that note, SkimLinks says that all dynamically created links, although formatted in the same link style as organic links, "utilize a disclosure tooltip on mouse-over, to implicitly communicate in an non-intrusive way that the link has the potential to generate revenue for the publisher".
When hovering the mouse over a node, tooltips provide a brief summary of the node information, and all direct protein interaction partners and the domains contained in them are highlighted automatically.
Moreover, upon hovering the mouse above a scaffold the tooltip is shown providing detailed information.
