António:
For label annotations, which are labels shown next to the vertices, you cannot set the font size of each vertex individually. You can only set the font size of all the vertices at once, which you would do by right-clicking the graph pane, selecting Graph Options from the right-click menu, selecting the Other tab on the Graph Options dialog box, clicking the Labels button on the Other tab, and clicking the Font button on the Label Options dialog box.
-- Tony
For label annotations, which are labels shown next to the vertices, you cannot set the font size of each vertex individually. You can only set the font size of all the vertices at once, which you would do by right-clicking the graph pane, selecting Graph Options from the right-click menu, selecting the Other tab on the Graph Options dialog box, clicking the Labels button on the Other tab, and clicking the Font button on the Label Options dialog box.
-- Tony