An Overlooked Feature
For years, my workflow for checking documentation in Xcode was the same: Cmd-click a symbol, select “Show Quick Help” from the context menu, read the popup, then dismiss it and continue coding. It works, but it is interruptive – each lookup requires three actions and breaks your editing flow.
Then I accidentally discovered the Quick Help inspector panel in the right sidebar.
How It Works
Open the Quick Help inspector with Option+Cmd+3, or go to View > Inspectors > Quick Help. This opens a panel in the right sidebar that displays documentation for whatever symbol your cursor is currently on. As you move your cursor through your code – clicking on a method, arrowing through parameters, selecting a type – the sidebar updates automatically.
There is no clicking, no popup to dismiss, no interruption. You just keep coding and the relevant documentation follows along.
Why It Beats Cmd-Click
The Cmd-click approach has a specific cost: it requires you to decide “I need docs for this” before you look. The sidebar inverts that. Because it is always visible, you absorb documentation passively. You notice parameter descriptions, return types, deprecation warnings, and availability annotations without making a conscious effort to look them up.
This is particularly valuable when working with unfamiliar APIs. Instead of Cmd-clicking every other symbol, you simply move your cursor through the code and read the sidebar as you go. It turns documentation lookup from a discrete action into a continuous stream.
The panel shows the same content as the Quick Help popup: declaration, description, parameters, return value, availability, and related symbols. The only difference is that it persists and updates in place rather than appearing and disappearing.
If you have the screen space for the right sidebar, keeping Quick Help open while coding is one of those small workflow changes that compounds over time.