Using the special OSX key, you may need to call the F1 key by pressing fn + F1 . So, here are two use cases that work for me:
- Open php.net documentation:
fn + shift + F1 - A quick look at php.net documentation:
fn + F1
You may also find it helpful that you can enable Quick documentation on hover. Open File > Preferences , go to the Editor section, and at the bottom uncheck the Show fast document when moving the mouse box.
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