Code Completion

Item	Description
Match case	Select this option if you want letter case to be taken into account when suggesting matches for code completion. Choose whether you want to match case for the first letter of for all letters. This will also affect how CamelCased identifiers are matched. If First letter only is chosen, you will need to type the first letter of a CamelCased identifier in the upper case, and then you can type middle letters that you want to match in the upper or lower case. If All letters is chosen, you will need to type all dividing letters of a CamelCased identifier in the upper case to match it.
Automatically insert single suggestions for	Automatically complete your code if there's just one suggestion for basic and type-matching completion.
Sort suggestions alphabetically	Choose this option if you want to sort items in the suggestion list in the alphabetical order instead of sorting them by relevance. You can change this behavior at any time by clicking the or icons in the suggestion list.
Show suggestions as you type	Select this checkbox if you want the suggestion list to be invoked automatically, without having to call completion explicitly.
Preselect the best match to insert it by pressing dot, parentheses, and other keys	If selected, the best match in the auto-completion popup is pre-selected with hard selection, otherwise with soft selection. Hard selection (blue in most color themes) lets you insert the selected item with `Enter`, `Tab`, `Space`, as well as dot, open parenthesis, open bracket, semicolon, and so on (depending on the context). Completion on Space can be enabled or disabled with the Whitespace inserts selected suggestion... checkbox on this settings page . Soft selection (gray in most color themes) will gently highlight the best match, but it will not interfere with typing — you can either continue typing to close the popup or choose the desired item manually. But if you see that the highlighted item is suggested correctly, you can still insert it by pressing `Tab`. Optionally you can also use `Enter` for inserting the suggestion with the soft selection — this can be disabled by clearing the Enter inserts suggestion... checkbox on this settings page . note When the completion popup is invoked explicitly, for example with `CtrlSpace`, the best match always has a hard selection.
Show the documentation popup in	Select this checkbox to have JetBrains Rider automatically show a popup for each item in the suggestions list with the documentation for the class, method, or field currently highlighted in the lookup list. In the field to the right, specify the delay (in milliseconds), after which the popup should appear.
Automatically insert parenthesis after completion	Defines how parentheses are inserted when completing a method. Note that you can type the opening parenthesis `(` instead of `Tab` or `Enter` when a method is selected in the completion list. In this case the pair of parentheses will be inserted regardless of this option.
Show import items in basic completion	When this checkbox is selected, completion items suggested by the Second basic completion will automatically appear in completion lists of automatic completion and basic completion. note This option does not affect C++. To include import items into basic completion in C++, use the corresponding option on the Languages & Frameworks \| C++ \| Code Completion page of JetBrains Rider settings .
Enter inserts suggestion even if completion popup is not focused (gray selection)	When cleared, this option allows additionally disabling completion on pressing `Enter` (it will insert a new line) only when the Preselect the best match... option above is cleared and the best match is not pre-selected:
Space inserts selected suggestion when completion popup is focused (blue selection)	When cleared, this option allows disabling completion on pressing `Space` (it will insert a whitespace) when the Preselect the best match... option above is enabled and the best match is pre-selected:

Machine Learning-Assisted Completion

Item	Description
Sort completion suggestions based on machine learning	Select this checkbox if you want to leverage machine learning models to rank most suitable items higher in the suggestion lists. Optionally, select languages where the ML-assisted completion should apply. When this feature is enabled, JetBrains Rider will send and receive statistics of completion choices at different caret positions to train and apply ML algorithms. The statistics are fully anonymous, they include no names of types or functions.
Mark position changes in the completion popup	If you are trying to understand, how ML assistance affects the order of suggestions in completion lists, it might be helpful to mark items that the ML algorithm moved higher or lower relatively to the standard suggestion sorting. Otherwise, if you are happy with ML suggestions, you can clear this checkbox.
Mark the most relevant item in the completion popup	When enabled, this option allows you to see if there is a completion item that the ML algorithm considers to be the exact match for the current position. If such item exists, it will be marked with an asterisk.

Item

Description

Sort completion suggestions based on machine learning

Select this checkbox if you want to leverage machine learning models to rank most suitable items higher in the suggestion lists. Optionally, select languages where the ML-assisted completion should apply.

When this feature is enabled, JetBrains Rider will send and receive statistics of completion choices at different caret positions to train and apply ML algorithms. The statistics are fully anonymous, they include no names of types or functions.

Mark position changes in the completion popup

If you are trying to understand, how ML assistance affects the order of suggestions in completion lists, it might be helpful to mark items that the ML algorithm moved higher or lower relatively to the standard suggestion sorting. Otherwise, if you are happy with ML suggestions, you can clear this checkbox.

Mark the most relevant item in the completion popup

When enabled, this option allows you to see if there is a completion item that the ML algorithm considers to be the exact match for the current position. If such item exists, it will be marked with an asterisk.

JavaScript

Item	Description
Only type-based completion	By default, JetBrains Rider suggests completion for symbols regardless of their types. With this approach, in complicated cases the list shows multiple completion variants. To make completion more precise, select the checkbox. The completion list will strongly depend on the JetBrains Rider inference. As a result, the list may remain empty in case of poor inference.
Suggest items with optional chaining for nullable types	By default, JetBrains Rider suggests completion for symbols with the optional chaining operator (?). To suppress showing such suggestions, clear the checkbox.
Expand method bodies in completion for overrides	By default, when you want to override a method from the parent class or interface and select this method from the list of completion suggestions, JetBrains Rider automatically adds parameters, generates a `super()` call, and adds the type information, if possible. Clear the Expand method bodies in completion for overrides checkbox to suppress automatic generation of method bodies for overrides during completion.
Completion of names	Suggest variable and parameter names: By default, the checkbox is cleared. When it is selected, JetBrains Rider suggests names for new class fields, variables, and parameters during their declaration. These suggestions are based on the names of classes, types, and interfaces that are defined in your project, in the libraries you are using, and in standard APIs. Suggest names for class fields The option is by default turned off. Add type annotations for suggested parameter names: Select this checkbox to supply each completion suggestion with information on its type. The checkbox is available only when the Suggest variable and parameter names checkbox is selected.

Parameter Info

Item	Description
Show parameter name hints on completion	Select if you want hints for parameter values to be displayed.
Show the parameter info popup in	Select this checkbox to have JetBrains Rider automatically show a popup with all available method signatures when an opening bracket is typed in the editor, or a method is selected from the suggestion list. In the text field to the right, specify the delay (in milliseconds) after when the popup window should appear. If this checkbox is not selected, use `CtrlShiftSpace` to show parameter info.
Show full method signatures	If this checkbox is selected, the parameter info displays full signatures, including method name and returned type.

Item

Description

Show parameter name hints on completion

Select if you want hints for parameter values to be displayed.

Show the parameter info popup in

Select this checkbox to have JetBrains Rider automatically show a popup with all available method signatures when an opening bracket is typed in the editor, or a method is selected from the suggestion list.

In the text field to the right, specify the delay (in milliseconds) after when the popup window should appear.

If this checkbox is not selected, use CtrlShiftSpace to show parameter info.

Show full method signatures

If this checkbox is selected, the parameter info displays full signatures, including method name and returned type.

SQL

Item	Description
Suggest objects from	Select where the objects are suggested from: The current search path only: only the schema selected for a console. For more information about selecting a schema, refer to Select the default schema. The current scope: the schema currently selected for a console and system schemas (for example, `pg_catalog` in PostgreSQL. All available schemas: all introspected schemas. The current path only The current scope All schemas
Qualify objects with	Select when to qualify the objects with databases, schemas, tables and views, and aliases of tables and views. Table/View: Always Table/View: Never
Qualify objects in	Select when to qualify the objects in the given cases. JOIN completion: Always JOIN completion: Never
JOIN clauses
Use aliases in completion for JOIN	Creates aliases for tables in the `JOIN` statement.
Invert order of operands in auto-generated ON clause	Switches operands in the `ON` clause. When the checkbox is cleared, the `FROM` table comes the first in the `JOIN` condition.
Suggest non-strict foreign keys based on the name matching	Generates you a list of possible code completion suggestions for `JOIN` statements. The code completion list includes suggestions of the columns from other tables that have the same names as columns from the table in the `JOIN` statement. Read more about debugging rules for this option in Debug rules for virtual foreign keys. Checkbox selected Checkbox cleared
Table aliases
Automatically add aliases when completing table names	Creates an alias for a table name.
Suggest alias names in completion after table names	Suggests an alias for a table name when you use code completion (`CtrlSpace`).
Custom aliases (table)	You can add a table name and the alias that you want to use for this table. To add the table-alias pair, click the Add alias button ().

Code Completion﻿

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Machine Learning-Assisted Completion﻿

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Parameter Info﻿

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Code Completion

Machine Learning-Assisted Completion

JavaScript

Parameter Info

SQL

Dart