Open in TheBrain

Hover Sneak Peek Feature

That exact behavior—where hovering over any unactivated thought automatically updates the content/notes panel to give you a "sneak peek" without shifting your focus—is not available by default in TheBrain v.15.

It has been a significant point of discussion in the v.15 beta forums, as many users relied on that frictionless skimming workflow.

TheBrain

Why the Change?

The removal or modification of the automatic hover-preview was largely a performance trade-off. In larger databases, constantly pulling up and rendering notes, attachments, and the newly overhauled backlink/unlinked-mention indexes on every single mouse hover caused noticeable interface lag and stuttering in the plex.

Your Best Alternatives in v.15

While you cannot currently slide the cursor around for an instant, passive preview like in v.14, you can achieve a similar effect using these adjustments: