The Mongo Management Studio provides the ability to set various defaults. These settings apply to the current user and are stored permanently. You can access to the settings by clicking the gear icon next to the "Connect" button.
Language
The localization of the application.
Default view for found documents
The view, which is set by default for displaying of found documents.
Color themes
Here you can set the color themes for the query-entry screens.
Secure save (with $set)
Is this option enabled, $set is used at each update of documents. This prevents accidentally overwriting of a document.
This option can also be changed with every update. This can be useful if you want to delete properties from a document. Therefor $set must be disabled.
JSON schema validation
Is this option enabled, a validation against the existing schema is performed at each insert and update of documents. (The schema )
Delete unknown properties when validating
If this option and the JSON schema validation option are selected, all properties will be deleted from the document during the validation, which are not defined in the schema.
Default page size
Determines how many documents are displayed per page by default. If nothing is specified, the default value is 50.
Default MongoDB port
Used as port, if you specify only the host name when connecting. Default value: 27017