To set the texture that appears when a button or checkbox is selected or unselected, use <button or checkbox>.downpicture( <texture> ) or <button or checkbox>.uppicture(<texture>), respectively. You can also apply a texture to the tick or bar on a slider.
To change the font of any of your GUI elements, just use <GUI element>.font(<font filename>. Vizard will look inside the Windows/Font directory when setting a font. You can browse that directory to see what fonts are available on your system.
To change the colors of text, background, and borders of GUIs, set their themes. This works for certain GUI elements (progress bars and droplists) and GUI containters (vizmenu, vizdlg, and vizinfo). The themeExample.py script (File > Quick Open > type: themeExample) shows how changing various theme properties affects a menu and info panel.
Getting data from GUI elements