With this function you can check any font asset to see if it has the italic flag or not. If it does the function will return true, otherwise it will return false.
font_get_italic(ind);
Argument Description ind Index of the font to check.
Boolean
if font_get_italic(fnt_Main)
{
draw_set_font(fnt_Main);
}
This will set the active drawing font to fnt_Main if it is set as italic in its font properties.