How do you translate "hover over"?
It's called (鼠标)悬停 in mainland China.

Please use your mouse to hover over the attribute icon
请将鼠标悬停在属性图标上。

If you search this phrase on the internet you'll see more examples how it's used, e.g.

鼠标悬停效果是网页制作的常用特效之一。
'Mouse over' is one of the most used special effect in web design.

You should note that many Computer related words are translated very differently in mainland China ('zh-cn' in locale terms) and other Chinese speaking regions, especially in Taiwan where there is a complete different set of words. You may want to update your question to clarify your user locale. If it's different from 'zh-cn' you may want to wait for another answer.