Let's Add A Mask Modifier
If we think back to padding from earlier, Masks are sort of similar except instead of pushing our element inwards, it crops it instead, in the shape of a rectangle that then gets added under our Mask Modifier.
In this example, we've added a Mast, then added a Frame to the mask with a width of 100. This has cutoff any part of our image that's wider than 100.
The two common uses for Masks are to curve the corners of an image, or to add an aspect ratio or frame to a Mask in order to crop an image