> For the complete documentation index, see [llms.txt](https://docs.expression-library.bearstudios.co.uk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.expression-library.bearstudios.co.uk/adding-custom-controls/example-expression/expression-with-master-controls.md).

# Expression With Master Controls

### Example 1:

Property: position\
Controls: Slider\
Description: adjusts position with an x slider and y slider

```javascript
/*
===expression.lib functions===
addMaster('master layer');
addSliderControl('master','X Position',0);
addSliderControl('master','Y Position',0);
===expression.lib end functions===
*/
//set master
var master = thisComp.layer("master layer");
//get effects from target

var xSlider = master.effect("X Position")("Slider");

var ySlider = master.effect("Y Position")("Slider");

//set x Position
var x = value[0] + xSlider;
//set y position
var y = value[1] + ySlider;
[x,y]
```

### Example 2:

Property: rotation\
Controls: Slider, Angle\
Description: Sets the rotation to the angle \* the slider

```javascript
/*

===expression.lib functions===
addMaster('master layer');
addSliderControl('master','multiplier',0);

addAngleControl('master','rotation',10);

===expression.lib end functions===

*/

//set master
var master = thisComp.layer("master layer");
//get effects from target
var multi = master.effect("multiplier")("Slider");
var rot = master.effect("rotation")("Angle");
//set rotation
rot*multi
```

### Example 3:

Property: scale\
Controls: Slider, Checkbox\
Description: Add the slider value to base value when checkbox is ticked. 

```javascript
/*


===expression.lib functions===
addMaster('master layer');

addSliderControl('master','Increase Amount',100);

addCheckboxControl('master','Size Increase',0);


===expression.lib end functions===

*/

//set master
var master = thisComp.layer("master layer");
//get effects from target

var checkbox = master.effect("Size Increase")("Checkbox");
var increase = master.effect("Increase Amount")("Slider");

//set scale
if ( checkbox == 1 ) {
	
    [value[0] + increase, value[1] + increase]

}else {
	
    value;

}
```