# Isabelle Prover IDE support
This extension connects to the Isabelle Prover IDE infrastructure, using the
VSCode Language Server protocol. This requires a recent development version of
Isabelle from 2017, see also:
* http://isabelle.in.tum.de/devel
* http://isabelle.in.tum.de/repos/isabelle/file/tip/src/Tools/VSCode
## Important User Settings ##
* `isabelle.home` points to the main Isabelle directory (ISABELLE_HOME).
* `isabelle.cygwin_root` (on Windows) points to the Cygwin installation,
e.g. ISABELLE_HOME/cygwin for a regular Isabelle application bundle.
## Isabelle symbols ##
Isabelle symbols like `\<forall>` may be rendered using the extension Prettify
Symbols Mode. It needs to be configured manually as follows:
ISABELLE_HOME/src/Tools/VSCode/extension/isabelle-symbols.json contains a
configuration (generated via `isabelle vscode_symbols`). Its content needs to
be copied carefully into the regular VSCode User Preferences.