In this part:
Changing PyCharm properties
PyCharm makes it possible to change
idea.properties files without editing them in the PyCharm installation folder.
To create an empty
idea.properties file or to copy
*.vmoptions file, choose
on the main menu respectively. Refer to the
menu items description for details.
Managing *.vmoptions file
The location of the
*.vmoptions file depends on the operating system you are currently using:
- For Windows:
<PyCharm installation folder>/bin/pycharm.exe.vmoptionsor
<PyCharm installation folder>/bin/pycharm64.exe.vmoptions
- For *NIX:
<PyCharm installation folder>/bin/pycharm.vmoptionsor
<PyCharm installation folder>/bin/pycharm64.vmoptions
- For macOS,
you need to make a copy of the
pycharm.vmoptionsfile in the IDE preferences folder and then edit this copy. The reason is that the app bundle is signed and you should not modify any files inside the bundle.
For older versions, the settings are stored in
To avoid editing files in the PyCharm installation folder, do one of the following:
- From the main menu, choose to create a copy
pycharm.vmoptionsfile in the user home directory. Refer to Edit Custom VM Options for details.
- Copy the existing file from the PyCharm installation folder somewhere and save the
path to this location in the
PYCHARM_VM_OPTIONSenvironment variable (
IDEA64_VM_OPTIONSfor 64 bit systems) .
- Copy the existing
<PyCharm installation folder>/bin/pycharm.exe.vmoptionsor the
<PyCharm installation folder>/bin/pycharm64.exe.vmoptionsfile from the PyCharm installation folder into your user home directory.
Then edit this file in the new location.
IDEA64_VM_OPTIONS for 64 bit systems) environment
variable is defined, or the
*.vmoptions file exists, this file is used instead
of the one located in the PyCharm installation folder.
Example: Increasing the heap size
To increase PyCharm heap size, you should copy the original
pycharm.vmoptions file to the
above-mentioned location, and then modify the
Managing idea.properties file
idea.properties file located in the
directory of the PyCharm installation folder should not be edited. Instead of editing the original
idea.properties file, create an
in the following location, open it for editing and add the required properties:
- For Windows:
- For *NIX:
- For macOS:
Example: Changing case of unicode literals
PyCharm allows defining whether non-ascii characters should use literals like
This behavior is controlled by the system property
idea.native2ascii.lowercase. By default,
upper case characters are used.
If it is desirable to use lower case characters, create the file
in the location specified above, open it for editing and add the following line:
Specifying custom JDK, properties or vmoptions files across platforms
A custom JDK,
*.vmoptions files are specified across platforms in
a unified way.
All the launchers look at the following environment variables: