Calligraphy requires aesthetically skilled writing in a chosen canonical style such as naskh, nastaʿlīq or ruqʿah.
[1] Some characteristics used in Latin scripts, like bold, letter spacing[dubious – discuss] or italic, are not usually used in Arabic typography.
They look as if they were written with a brush or oblong pen, akin to how serifs originated in stone inscriptionals.
Other fonts, like Tahoma and Noto Sans Arabic, use a mono-linear style more akin to sans-serif Latin scripts.
شكل الاستاذ بقى منسجمن استاذ حمام .. نحن الزغاليل شكل الاستاذ بقى منسجمن استاذ حمام .. نحن الزغاليل Historically, Arabic text used overlines to indicate emphasis.