These options control automatic path completion in path fields (mainly in the breadcrumbs bar, but also in other path fields throughout the program).
With path completion enabled, as you type a path in Opus autocompletes the current folder name with the first matching folder found. You can ignore it and keep typing, or press a path separator key (:, / or \) or Enter to accept the completed path component. You can also press the ↑ or ↓ cursor key to scroll through other matching folder names.
As well as regular paths Opus also auto-completes paths that you begin with a % character (for environment variables), paths that begin with a / (aliases), and URL-style paths (coll:// or ftp://, for example). When the cursor is at very beginning of the field there are also some special characters that will be expanded to certain locations as a shortcut:
~ (tilde) | Your personal profile folder |
` (back-tick) | The desktop directory |
$ (dollar sign) | Your documents folder |
* (asterisk) | Your favorites folder |
} (right brace) | The Windows folder |
^ (caret) | The Windows System folder |
# (hash/pound sign) | The program files folder |