Windows: File Explorer > View > Show > Hidden items
Windows: Control Panel > File Explorer Options > View > Show hidden files, folders, and drives
macOS: In Finder, press Command + Shift + .
macOS: In Finder, use Go > Go to Folder and enter the hidden path
Linux: In file managers, enable Show Hidden Files
Linux: Press Ctrl + H in many file managers
Terminal: use ls -la to list hidden files
Terminal: use dir /a on Windows Command Prompt
Terminal: use Get-ChildItem -Force in PowerShell