To find the extrema on any letterform with curves, draw a box around the exterior of the letter and another around any interior counters (the negative space inside the letterform) and look at where the edges of the letter shapes touch the boxes—those are the extrema.

Gestalt principles of visual perception

Just like color, shapes, and music can evoke different emotions, so can typography. A design can go from old-fashioned to modern to chic by simply swapping out the typeface, making type an incredibly important branding element of the UI. But emotion isn’t the only consideration when it comes to choosing type for a screen. Since many users will face