You can use this event to change the size of an object. The new size must be expressed as floating point values relative to the current size of the object. A value smaller than 1.0 shrinks the object, a value greater than 1.0 enlarges the object, a value of 1.0 means no change. 0.0 and negative values are not allowed. You can specify separate scaling values for the x and y axes.
An example: A value of 2.0 on the x axis, and a value of 0.5 on the y axis would mean the following: Enlarge the object by 200% on the x axis and shrink the object to 50% of its size on the y axis. This will of course generate a distorted image. Normally, you will want to use identical values for both axes.
It is also possible to only change the width or the height of an object. You can achieve that by simply leaving one of the text widgets empty.
You can also use variable names instead of numeric constants with this action event. It is even possible to enter complete expressions like "x+1" or function calls for maximum flexibility here.
Also note that the object will be scaled relative to its anchor point which is usually set at 0.5/0.5 which means that scaling is done around the object's center point.