For information on the grid color and the line type please read Pulldown menu / Option / 'Settings' in the chapter Editor.
The following settings for the grid are available in the context menu of a picture:
Display grid: Here you can decide to show or to hide the grid. (Default: inactive)
Use grid: If this option is activated, all the elements are aligned in the grid. (Default: inactive)
If the grid is only five pixels or below, only the grid lines with a distance of more than five pixels are displayed. For the positioning also the smaller grid lines are used.