When I enter '?' on https://query.wikidata.org I should get a dialog showing the list of keyboard shortcuts.
Ctrl/Command+Enter: Run query Esc: Leave current input field/textarea ?: Toggle Help menu i: Focus on query textarea r: Jump to query result f: Focus on "Fliter" button in Query Helper s: Focus on "Show" button in Query Helper m: Click "Limit" button in Query Helper e: Show examples l: Show language menu
Mock:
Notice existing shortcut should get different key assigned.