By default quick search starts automatically on typing file name.
If you want to type into the command line change that in Settings Window in section "Behavior/Quick Search".
Quick Search opens the panel:
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Button for switching to Quick Search.
Hot key Alt+Q.
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A toggle for the method of searching.
By click or pressing Alt+Q.
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Pin search results.
Hot key Ctrl+S.
Keeps found files only in the list. Filtered list gets held and not reset as usual after a short delay.
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Autofilter.
Automatically shows only found files in the list.
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Quick Search settings.
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