# Specifying Points Using Coordinate Filters

Use coordinate filters (XYZ Point Filters) to:

- Relate point inputs to the coordinates of existing entities
- Divide a point specification into separate X-, Y-, and Z-coordinates

You can enter combinations of these coordinate filters whenever a command prompts for a point: **.x**, **.y**, **.z**, **.xy**, **.xz**, **.yz**, and **.xyz**.

Coordinate filters are useful for 2D construction, especially when combined with EntitySnaps (ESnaps) methods. With ESnaps, you can obtain separate X, Y, and Z values from significant points on existing entities.

In 3D space, you can click the X- and Y-coordinates, then enter the Z-coordinate with the keyboard.

To specify points using coordinate filters:

- Type a command requiring coordinates, for example,
**Line**. - Specify the coordinate filter (
**.x**,**.y**,**.z**,**.xy**,**.xz**,**.yz**, and**.xyz**). - Specify the entity the filter applies to by entering the X or Y value of a point separately with respect to existing geometry.
- Specify additional points as needed.

#### Command sequences

To use coordinate filters in 2D drawings:

: **Line**

**Specify start point» .x**

of **end**

of **<P1**>

of **<P2> **

of (need YZ): **end**

of **<P1**>

**Specify next point» @5<0**

To identify the center of a cube:

: **Point**

**Specify position» .x**

of **mid**

of **<P1>**

of **<P2>**

of (need YZ): **.y**

of **mid**

of **<P3**>

of **<P4>**

of (need XZ): **mid**

of **<P5**>