Hybrid numerals don’t share the font’s cap-height or x-height, but instead occupy their own height.

Hybrid numerals don't share the font's cap-height or x-height, but instead occupy their own height.

Guide layers are used to insert guides (such as x-height or cap-height guides).

The letters on the left come from Playfair Display, which has a large x-height relative to its cap-height.

The letters on the left come from Playfair, which has a large x-height relative to its cap-height.

A value of 0 aligns the bottom of the object to the cap-height position.

In some cases, however, they can match or even be lower than the cap-height.

Similarly to the undershoot, an area of overshoot is needed to provide the illusion of alignment at the x-height and at the cap-height (see below).

Ascenders usually exceed the cap-height by at least a little, especially in text designs.

Ascenders usually exceed the cap-height by at least a little, especiually in text designs.