How to hide purchased items in Mac App Store?

Hi all,
I checked the technical support documents on the Apple website,The document says to find the purchase record and hover the mouse pointer on the App that needs to be hidden, and then a button with more options will appear,there will be an option to hide App in the pop-up menu.But what should we VoiceOver users do?I use VO and the cursor to move to the App I want to hide, and then try to move the mouse pointer over, but there is no button for more options.How do you hide the app?