1. A computer-implemented method, comprising: 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 and by at least one computing device: 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 of the typographic attributes for one or more of the text characters dependent on a combination of the calculated distance and the calculated velocity, with different calculated distances and different calculated velocities in the same particular direction causing different modifications of the typographical attribute; re-rendering the one or more text characters according to the modified typographical attribute; and modifying a stored version of the one or more text characters based on the modified typographical attribute.
4. The computer-implemented method of claim 1 , further comprising: displaying values for the typographic adjustment attributes within an adjustment panel window, wherein the adjustment panel window accepts input for changing the typographic adjustment attributes, and wherein the adjustment panel window is displayed concurrently with and distinctly from the text characters; and updating said displayed values for the typographic adjustment values within the adjustment panel window in response to said modifying the one or more of the typographic attributes for the one or more of the text characters.