Image yscale

Explanation
The local variable yscale indicates the factor by which the image is scaled vertically. Negative values will cause the image to be mirrored.

Examples
yscale=2
 * the height of the image will be doubled (and of course it is stretched to fit that size)

yscale=1/2
 * the height of the image will be halved.

Suppose a sprite has a height of 32 pixels. When yscale is set to 2, the sprite's height will be 64 pixels.

Note that this variable does not change the sprite resource. Note also that changing either x_scale or y_scale can cause distortion and other unwanted outcomes during use