11. A system, comprising: at least one processor; and a memory comprising program instructions, wherein the program instructions are executable by the at least one processor to cause the system to perform operations including: activating a typographic attribute adjustment mode in response to detecting an input when at least one of a cursor or a touch-input component is over a region of selected text or over a text insertion point on a display, wherein text characters are rendered on the display based on typographic attributes; receiving an indication of movement of the at least one of the cursor or the touch-input component in a particular direction across the display while the typographic attribute adjustment mode is active, wherein the movement begins at a point within the region of selected text or begins at the text insertion point, and ends at or intersects a different point, the different point occurring at a different location on the display than the point at which the movement begins; in response to receiving the indication of the movement across the display while the typographic attribute adjustment mode is active: calculating a distance between the point at which the movement begins and the different point; calculating a velocity of the movement; modifying a typographical attribute for one or more of the text characters dependent on the calculated distance in combination with the calculated velocity, with different calculated distances and different calculated velocities in the same particular direction causing different modifications of the typographical attribute; and re-rendering the one or more text characters according to the modified typographical attribute.
14. The system of claim 11 , wherein the typographical attribute comprises one or more of a tracking value, a baseline shift value, a leading value, or a kerning value.