It is possible to adjust the size of drawing detailing elements in 2D and 3D windows using following buttons located on the View Toolbar:
Enlarge font size
Reduce font size
In result, size of font and arrows gets increased in parameters of detailing elements (dimensions, leader notes, texts, GD&T formlimits, roughness symbols, drawing notes, variation table, detail view designations) existing on a current drawing page or in 3D scene, depending on which window the command is called from. For view arrows and cutting lines, this commands only affect arrows size, while font size doesn't change. Font size of view labels and title block also doesn't change.
See also: