Aegisub path specifiers

From Aegisub Manual

Aegisub uses a simple system for denoting file locations. Most pathnames in Aegisub can be written starting with special variables, that each refer to specific locations.

• ?data - The location where application data are stored. On Windows this is the installation directory (the location of the .exe). On Mac OS X this is inside the application bundle. On other POSIX-like systems this is $prefix/share/aegisub/.
• ?user - The location for user data files, this is configuration files, automatic back-ups and some additional things. On Windows this %APPDATA%\Aegisub\, on Mac OS X this is $HOME/Library/Application Support/Aegisub/ and on other POSIX-like systems this is $HOME/.aegisub/. Enabling the "local configuration" option changes the value of this.
• ?temp - The system temp directory. Audio cache and any required temporary subtitle files are stored here.
• ?script - Only defined if a script file is open and saved somewhere, in which case it points to the location of the script.
• ?video - Only defined if a video file is loaded. Points at the location of the video file. Do note that this is not a good place to save things with dummy video loaded.
• ?audio - Only defined if an audio file is loaded. Points at the location of the audio file.