Grid
The Settings->Grid submenu allows you to change the grid settings:
- Settings->Grid->Show Grid will toggle between
displaying the grid on the canvas and
hiding it. If there is enough memory available, the grid will be
stored as a bitmap in order to improve redraw speed.
-
Settings->Grid->Lock Grid will
toggle between locking and unlocking the grid. If the grid is
locked, mouse clicks will be translated to the nearest tick mark.
This means that if you use a mouse click to set the location of
a control point when constructing a path, the
point will be placed at the nearest tick mark. This also means that
when you move a point while in
edit mode, the point will be moved
in intervals of the gap between tick marks. Note that locking the
grid does not affect the keyboard or menu driven functions, such as
Navigate->Go To... (F5) or emulate a mouse click
(F4).
When the grid is locked, the status bar will show the image
otherwise it will show the image
.
Warning: if you lock the grid, you will be unable to use the mouse to select narrow paths that lie between tick marks as mouse clicks will be translated to the nearest tick mark, unless you use the drag rectangle (which may select other objects as well). Similarly, if the size of the control points is less than the gap between the tick marks, you will not be able to select control points using the mouse whilst in edit mode. (You will however be able to select them using the Next Control (F6) popup menu item.)
- Settings->Grid->Grid Settings... will produce a
dialog box in which you can specify the position of the tick marks
and the units used. You can either use a rectangular grid with the
origin at the top left hand corner of the canvas (Figure 3.1(a)), or you can use a radial grid with the
origin at the centre of the canvas (Figure 3.1(b)).
(a) 
(b) Figure 3.1: Available grids: (a) rectangular grid; (b) radial grid