Global Variable


The kind of vertical layout of the text block.


let kCMTextMarkupAttribute_VerticalLayout: CFString


Value must be one of the CFString constants in Vertical Layout Constants indicating the progression direction for new vertical lines of text. If this attribute is present, it indicates the writing direction is vertical. The attribute value indicates whether new vertical text lines are added from left to right or from right to left. If this attribute is missing, the writing direction is horizontal.

If used, this attribute must be applied to the entire attributed string.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software